Pesticide synergist and pesticide composition thereof

The pesticide synergist is prepared from the following components in parts by weight: 5 to 70 parts of soybean extract and 5 to 20 parts of esterified vegetable oil, the fertilizer is prepared from, by weight, 8 parts of N-octyl pyrrolidone, 63 parts of soy isoflavone, 5 parts of castor oil polyoxyethylene, 5 parts of humic acid, 4 parts of potassium humate and 5 parts of wetting agent. The granular agrochemical composition further contains an agrochemical active ingredient, a surfactant, a hollow body having a particle diameter of 1-600 [mu] m, and a solid carrier, has a particle size distribution in which particles having a particle diameter of 3 mm or more account for 80% or more, and has the property of floating on the water surface and disintegrating on the water surface within 30 minutes, the particle diameter of the agrochemical active ingredient is 10 [mu] m or more and less than 100 [mu] m, and is less than 1/10 of the short diameter of the granular agrochemical composition. The raw materials used in