NOVELTY - Preparation of 90% mancozeb microcapsules includes adding water and ethylenediamine in a reactor, raising the reactor temperature, dropwise adding carbon disulfide under constant agitation, stirring, raising the reactor temperature, adding manganese sulfate under constant agitation, stirring, adding zinc sulfate, stirring, adding dispersant and wetting agent, adjusting pH by pH adjusting agent, adding urea-formaldehyde resin, shear emulsifying to obtain mancozeb emulsion, continuously spraying and solidifying in a spray tower, and obtaining 90% mancozeb microcapsules.    USE - Preparation of 90% mancozeb microcapsules (claimed).    ADVANTAGE - The method provides 90% mancozeb microcapsules having high content of active component mancozeb, low production cost, controlled release, and safe usage, has simple and safe preparation and environmental protection, reduces environmental pollution, and is cost saving.    DETAILED DESCRIPTION - Preparation of 90% mancozeb microcapsules comprises adding water and ethylenediamine in a reactor, raising the reactor temperature to 50 degrees C, maintaining a temperature of 50 plus minus 5 degrees C, dropwise adding carbon disulfide for 30 minutes under constant agitation, stirring for 30 minutes, raising the reactor temperature to 60 degrees C, adding manganese sulfate for 40 minutes under constant agitation, stirring for 30 minutes, adding zinc sulfate, stirring for 1 hour, adding dispersant and wetting agent, adjusting pH at 7 by pH adjusting agent, adding urea-formaldehyde resin, shear emulsifying for 30 minutes to obtain mancozeb emulsion, continuously spraying and solidifying in a spray tower, and obtaining 90% mancozeb microcapsules. An INDEPENDENT CLAIM is included for 90% mancozeb microcapsule comprising capsule core and capsule shell, where capsule core comprises carbon disulfide, ethylenediamine, manganese sulfate, zinc sulfate, dispersant, wetting agent, pH regulator and water, and capsule shell comprises urea-formaldehyde resin.