TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The strain is spore forming bacteria and saccharomycetes, where the spore forming bacteria is Bacillus megaterium (preferred) or Bacillus licheniformis or Bacillus subtilis, and the saccharomycetes is Lactobacillus fermentum, preferably Candida lipolytica. The mixed strain group comprises Pseudomonas. Preferred Method: The strain cultivation and activation method includes: (i) preparation of: Pseudomonas inclined surface medium comprising (in g) beef extract (3), peptone (10), sodium chloride (5) and agar and water (1000 ml); of Bacillus megaterium inclined surface medium comprising glucose (in g) (10), sodium chloride (0.3), magnesium sulfate (0.3), manganese sulfate (0.3), calcium carbonate (1), ammonium sulfate (0.5), potassium chloride (0.3), ferrous sulfate (0.03), lecithin (0.2), enzyme powder (0.5) and agar and water (1000 ml); of Candida lipolytica inclined surface medium comprising (in g) soybean sprouts (100), glucose (20), water and agar (1000 ml), cleanly washing soybean sprouts, adding water to boil for 30 minutes, and filtering with a gauze, and adding agar into the filter liquid, heating and dissolving, adding sugar, stirring to dissolve and adding water to 1000 ml; (ii) transmitting the strain into fresh inclined surface medium, and cultivating at 30 degrees C for 24 hours to obtain activated strain, and respectively adding the activated strain into the shake flask culture medium, where the inoculation size is 1-3%, preferably 2%, and cultivating at 20-40 degrees C for 10-30 hours, preferably at 30 degrees C for 18 hours, where the revolving speed of shaking bed is 100-300 revolutions/minute, preferably 180 revolutions/minute. The bacterial liquid composite method includes: inoculating the activated Pseudomonas, Bacillus megaterium and Candida lipolytica in a ratio of 1:1:1 into kitchen sewage waste liquid, where the inoculating size is 1-3%, preferably 2%, adding poultry manure auxiliary material (40-80%, preferably 60%) to obtain propagated bacterial liquid. The bacteria propagation and bacterial fertilizer preparation method includes fermenting the bacterial liquid at 30 degrees C for 72 hours. ACTIVITY - Fertilizer.