Claim 1: the microcapsule contains components of active compounds, the microcapsule has a wall, a polyurea composed of a polyisocyanate and a filter, 6. The interleaver is the product of the co polymerization of the hydroxide salt with styrene and impurities. 13. Claim 5: component of any of the above claims, wherein the hydroxide salt is ammonium hydroxide or metal hydroxide in the first or second category of the periodic table. Requirement 6: according to the composition of requirement 5,Hydrogen oxidation is selected from sodium hydroxide, potassium hydroxide, magnesium hydroxide and calcium hydroxide. 11. Claim 7: according to the composition of any of the above requirements, i.e. selecting polyisocyanate from 1-chloro-2,4-diisocyanate, m-diisocyanate, p-diisocyanate, 4,4-methylphenol (phenylisocyanate),Toluene 2,4-diisocyanate, toluene diisocyanate (60%, 2,4-isomer, 40%, 2,6-isomer), toluene 2,6-diisocyanate, 3,3-dimethyl-4,4,4-methylphenol (2-methylphenyl isocyanate),3,3-dihydro-4,4-diisocyanate, 2,2,5,5-tetramethyl-4,4-diphenyl-isocyanate, 80% 2,4-20%, 2,6-diisocyanate toluene isomer and polymethylene phenyl isomer (Papi),And the old mix. Claim 9: the composition of any one of the above requirements, including the first microcapsule with the first polyisocyanate wall and the second microcapsule with the second polyisocyanate wall, The second polyisocyanate is different from the first polyisocyanate. 11. Claim 11: a component conforming to claim 10, wherein the active compound is sulfur phosphorus, organic phosphorus compound, diacid, isoxazolidinone or a mixture of the above compounds. Requirement 12: composition according to requirement 11,Where the active compound is clomazone. 13. Claim 13: the process of preparing the micro encapsulation active ingredient includes: providing an aqueous phase, including an interleaver generated by the reaction of the hydrogen oxide salt with the co polymerization product of styrene and nitrogen dioxide impurities； providin
