Preparation method of degradable chemical fertilizer caking inhibitor

The invention discloses a preparation method of a degradable chemical fertilizer caking inhibitor, and belongs to the technical field of preparation of chemical fertilizer caking inhibitors. The method comprises the following steps: washing and crushing clam shells, screening and drying the crushed clam shells to obtain clam shell powder, taking loofah sponge, carrying out ammonia water explosion treatment to obtain alkali celluloses, absorbing water and crystal water in a chemical fertilizer by using calcium carbonate in the clam shells and the loofah sponge alkali celluloses, taking gelatin and white carbon black, stirring and reacting above materials, concentrating the obtained reaction product to obtain a concentrate, and stirring and mixing the concentrate, tung oil and other assistants to obtain the degradable chemical fertilizer caking inhibitor. The gelatin and the tung oil form a protection film on the surface of the chemical fertilizer to prevent water and air from entering. All raw materials used i