NOVELTY - Collecting and recycling disease germ in water environment comprises preparing carrier tape positive charge filter material by preparing magaldrate colloid, centrifuging, roasting, crushing, sieving and roasting; preparing filter; preparing eluent by dissolving disodium hydrogen phosphate and sodium dihydrogen phosphate in water, and adding pure Tween 80 (RTM: polyoxyethylene (20) sorbitan monooleate); and putting water sample in tank, collecting filtered water sample, putting eluent in filter, shaking, eluting, and mixing eluted solutions to obtain concentrated liquid.    USE - Method of collecting and recycling disease germ in water environment (claimed) including running water, cleaning water, seriously polluted water and sewage.    ADVANTAGE - The method has stable efficiency, and is simple, economical, practical, and very suitable for laboratory. The recycling rate for clean water can reach 90% and the recycling rate for seriously polluted water can reach more than 80%. The filter material can be simply treated to be reused and other materials can be reused for many times.    DETAILED DESCRIPTION - Collecting and recycling disease germ in water environment comprises: (A) preparing carrier tape positive charge filter material by: (Ai) preparing magaldrate colloid by dissolving aluminum chloride hexahydrate and magnesium chloride hexahydrate in deionized water at mole ratio of 1:3 to make the final concentration of aluminum ion (Al3+) and magnesium ion (Mg2+) into 0.1 mol/L and 0.3 mol/L, respectively; (Aii) slowly adding sodium hydroxide solution while stirring at 150-500 revolutions/minute until there is no precipitate; (Aiii) adjusting pH at 8.0 using hydrochloric acid, continuously stirring for 2 hours, standing and aging; (Aiv) pouring out supernatant after a day, using deionized water to compensate the volume, uniformly stirring, performing water exchange operation three times, and continuously performing the operation for 5 days; (Av) centrifuging aged magaldrate colloid at 6000 revolutions/minute for 10 minutes, and pouring out supernatant to obtain magaldrate precipitate; (Avi) oven-drying magaldrate precipitate at 55 degrees C for 48 hours; (Avii) roasting dried precipitate at 200 degrees C for 2 hours, baking at 400 degrees C for 2 hours, and baking at 600 degrees C for 4 hours; (Aviii) crushing magaldrate block and sieving to obtain grains with diameter of 0.45-0.2 mm; and (Aix) roasting magaldrate grains at 800 degrees C for 4 hours, and naturally cooling; (B) preparing filter by: (Bi) inserting organic glass tube with diameter of 2-6 cm and with certain length in hard plastic tube with diameter of 0.5 cm and length of 2 cm to form water outlet tube; (Bii) fixing stainless steel net of 200 meshes having the same inner diameter with organic glass tube at 1 cm away from the water outlet end to bear the filter material and filter water; (Biii) processing segment of threads on the other end of organic glass tube and providing plastic screw cap with the same diameter; (Biv) opening small hole in the middle of screw cap and cooperatively installing hard plastic water inlet tube with diameter of 0.5 cm and length of 2 cm; (Bv) opening screw cap, putting in magaldrate filter material and tightening; and (Bvi) assembling filter system comprising high level water tank, sterilizing container, plastic guide tube, filter and flow rate controller, all connected by rubber hose; (C) preparing eluent by completely dissolving disodium hydrogen phosphate and sodium dihydrogen phosphate in deionized water to prepare buffer solution with pH value of 6.5, adding pure Tween 80 (RTM: polyoxyethylene (20) sorbitan monooleate) in buffer solution, uniformly stirring to prepare eluent with concentration of 0.5%, and sterilizing at 121 degrees C under high pressure for 20 minutes; and#concentrating water by putting water sample in high level water tank, adjusting flow rate to make the water sample flow to filter at constant speed, using sterilizing container to collect filtered water sample, taking out filter from filter system, putting 10 mL eluent in filter, sealing water inlet tube and water outlet tube, shaking eluted filter material for 3 minutes, discharging eluent, eluting 4-5 times with 10 mL eluent, mixing eluted solutions to obtain concentrated liquid.