Method for preparing pesticide by taking isocyanate as intermediate

The invention discloses a method for preparing a pesticide by taking isocyanate as an intermediate, and belongs to the technical field of pesticide preparation, and the method specifically comprises the following steps: preparing the following raw materials in parts by weight: 600-900 parts of a modified isocyanate solution, 35-50 parts of an excipient, 15-35 parts of a filler, 2-7 parts of a synergist, 1-5 parts of an anti-ultraviolet agent and 6-12 parts of an auxiliary agent; a pre-mixing stage: weighing the raw materials according to the formula weight parts, adding the modified isocyanate solution, the excipient and the filler into a stirring tank, and mixing and reacting to form a pre-mixed solution; a mixed solution preparation stage: adding a synergist and an anti-ultraviolet agent into the premixed solution in the stirring tank, and uniformly stirring to form a basic mixed solution; the traditional isocyanate is modified, and the modified isocyanate is used as an intermediate to prepare the pesticide