Production method of crop root strengthening fertilizer

The invention discloses a production method of crop root strengthening fertilizer. The production method comprises the following steps: 1, material preparation, wherein a mixture which is prepared from sludge and straw powder according to the mass ratio of 4:3, ammonia water, thoroughly decomposed cow dung, realgar powder, urea, seaweed meal, pimacol, potassium humate, potassium sulfate and an aqueous solution with the wetting agent mass ratio being 8% serve as raw materials; 2, activation, wherein the mixture which is prepared from the sludge and the straw powder according to the mass ratio of 4:3 and the potassium sulfate are pulverized into powder with the size ranging from 80 meshes to 120 meshes, the powder is heated to 150-200 DEG C, the temperature is held for four hours, then the temperature is lowered to the room temperature, and the powder is left for standby application; 3, fermentation, wherein the ammonia water, the thoroughly decomposed cow dung, the realgar powder, the urea and the seaweed meal are mixed together, compost fermentation is conducted, and after fermentation lasts for 15-18 days, the mixture is left for standby application. The production method is simple, capable of promoting flourishment of seedling roots and particularly suitable for the seedling raising state, and for root systems of seedlings cultivated through the fertilizer, 4-8 more roots are developed compared with those of seedlings cultivated through traditional fertilizer.