TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: Treating wastewater from papermaking comprises: (a) providing two or more strains selected from Halomonas sp.Y2 CCTCC NO: M 208188, Halomonas sp.17-5 CCTCC NO: M 208192, Halomonas sp.19-A CCTCC NO: M 208186, and Halomonas sp.19-D CCTCC NO: M 208193, and subjecting selected strains to the treatments as follows: (i) slant culture comprising inoculating the Halomonas strain into a solid slant culture medium having a pH of 8.0 and comprising agar powder having a weight percent of 1.5-2.0%, culturing the thalli for 15-24 hours at 30 plus minus 1 degrees C; (ii) first order seed culture which comprises inoculating the thalli, of 1-4 rings, cultured in the (i) into 100 ml of complete liquid nutrient medium under an aseptic condition through inoculating loop; then subjecting to shaking culture for 15-24 hours, until reaching to metaphase of logarithmic phase, under the condition of 30 plus minus 1 degrees C and within the shaking table of 120-200 revolutions/minute (rpm), thus to prepare the first order seed; (iii) intermediate culture which comprises inoculating the first order seed into100 ml of complete liquid nutrient medium under such a condition that volume ratio is 5-8% of inoculation quantity; then subjecting to shaking culture for 15-24 hours, until OD 620 nm is 10-12, under the condition of 30 plus minus 1 degrees C and within the shaking table of 120-200 rpm, thus to prepare the second order seed; (iv) collecting Halomonas strains which comprises centrifuging for 5-8 minutes at 5000 rpm, then collecting the thalli prepared in the (iii) and then washing for 3-4 times using physiological saline; and re-preparing a bacterial suspension for which OD 620 nm is 10-12 using the physiological saline, for standby; (b) providing two or more strains selected from Bacillus sp.Y4 CCTCC NO: M 208189, Bacillus sp.Y5 CCTCC NO: M 208190, Bacillus sp.17-1 CCTCC NO: M 208183, Bacillus sp.17-3 CCTCC NO: M 208184, Bacillus sp.17-4 CCTCC NO: M 208185, Bacillus sp.19-B CCTCC NO: M 208187, and Bacillus sp.Y6 CCTCC NO: M 208191, and subjecting the strains to the treatments as follows: (v) slant culture which comprises inoculating the Bacillus strain into a solid slant culture medium having a pH of 8.0 and comprising agar powder having a weight percent of 1.5-2.0%, then culturing the thalli for 15-24 hours at 30 plus minus 1 degrees C; (vi) first order seed culture which comprises inoculating the thalli, of 1-4 rings, cultured in (v) into 100 ml of complete liquid nutrient medium under an aseptic condition through inoculating loop; then subjecting to shaking culture for 15-24 hours, until reaching to metaphase of logarithmic phase, under the condition of 30 plus minus 1 degrees C and within the shaking table of 100-150 rpm, thus to prepare the first order seed; (vii) intermediate culture which comprises inoculating the first order seed into100 ml of complete liquid nutrient medium under such a condition that volume ratio is 5-8% of inoculation quantity; then subjecting to shaking culture for 15-24 hours, until OD 620 nm is 10-12, under the condition of 30 plus minus 1 degrees C and within the shaking table of 100-150 rpm, thus to prepare the second order seed; (viii) collecting Bacillus strains which comprises centrifuging for 5-8 minutes at 5000 rpm, then collecting the thalli prepared in the (vii) and then washing that for 3-4 times by using physiological saline; and then re-preparing a bacterial suspension for which OD 620 nm is 10-12 by using the physiological saline, for standby; (c) constructing artificial flora which comprises merging the bacterial solutions based on a volume ratio of Halomonas sp.Y2:Bacillus sp.Y4:Bacillus sp.Y5:Bacillus sp.17-1:Bacillus sp.17-3:Bacillus sp.17-4:Halomonas sp.17-5:Halomonas sp.19-A:Bacillus sp.19-B:Halomonas sp.19-D:Bacillus sp.Y6 is 1-4:1-4:0-1:0-1:1-2:0-1:1-2:1-2:0-1:0-1:1-2; and (d) treating black liquor of papermaking which comprises inoculating constructed artificial flora into papermaking wastewater of straw pulp in which pH is 9-11 and COD is 1000-140000 mg/L, based on a volume ratio of 15-30% of inoculation; and then subjecting papermaking wastewater of straw pulp to static treatment under a condition of 35-38 degrees C, where in the process of static treatment the step for stirring is implemented intermittently and samples are intermittently taken for determining pH, color, and COD index of papermaking wastewater; when pH of the papermaking wastewater is reduced to 7.0-8.8, the treatment is ended. Concentration of the complete liquid nutrient medium (based on weight percent) is: 1% glucose, 1% peptone, 0.5% yeast extract paste, 1% beef extract, 1-3% sodium chloride (NaCl), and 1 ml mixed solution of metal ion; where distilled water is added to the liquid nutrient medium obtain 1 L; and the pH of the liquid nutrient medium is regulated at 8.0 using 4 M sodium hydroxide (NaOH); and concentration of the mixed solution of metal ion is: 0.5 g zinc chloride (ZnCl2), 0.5 g iron (II) chloride (FeCl2), 0.5 g manganese (II) chloride tetrahydrate (MnCl2.4H2O), 0.1 g sodium molybdate dihydrate (Na2MoO4.2H2O), 0.05 g copper chloride dihydrate (CuCl2.2H2O), 0.05 g sodium tungstate dihydrate (Na2WO4.2H2O), and 120 mol hydrochloric acid (HCl); and concentration of the solid slant culture medium is the complete liquid nutrient medium comprises 1.5-20% of agar powder based on weight percent. Constructing artificial flora comprises mixing bacterial solutions based on a volume ratio of Halomonas sp.Y2:Bacillus sp.Y4:Bacillus sp.Y5:Bacillus sp.17-1:Bacillus sp.17-3:Bacillus sp.17-4:Halomonas sp.17-5:Halomonas sp.19-A:Bacillus sp.19-B:Halomonas sp.19-D:Bacillus sp.Y6 of 4:2:1:1:2:1:1:2:1:1:2. Constructing artificial flora comprises mixing bacterial solutions based on a volume ratio of Halomonas sp.Y2 CCTCC NO. M 208188:Bacillus sp.Y4 CCTCC NO. M 208189:Bacillus sp.17-3 CCTCC NO. M 208184:Halomonas sp.17-5 CCTCC NO. 208192:Halomonas sp.19-A CCTCC NO. M 208186:Bacillus sp.Y6 CCTCC NO. M 208191 of 2:1:1:1:1:1. The constructed artificial flora is inoculated into the papermaking wastewater of straw pulp based on a volume ratio of 20% of inoculation quantity, and the papermaking wastewater of straw pulp is subjected to static treatment at 37 degrees C. In the method, the stirring time is 15-30 minutes, rotation speed is 50-120 rpm, and intermittence time is 4-8 hours.