The invention discloses a preparation method of fertilizer adhesive of plant growth regulator type and a product, pertaining to the treatment field of black liquid from basic straw pulp. The black liquid from basic straw pulp is taken as raw material, cooled, treated with biochemical method, evaporated, concentrated, sprayed and dried to obtain the fertilizer adhesive of plant growth regulator type. The generated fertilizer adhesive of plant growth regulator type has excellent bond behavior and the advantages of small used amount and good particle formation effect when being added during the particle formation process of inorganic compound fertilizers. The fertilizer taking the invention as adhesive can obviously stimulate the growth of crops once the invention is put into the soil and promote the application effect during the initial stage of the product. Long-term application of the product can promote the formation of soil aggregate structure and change the soil structure fundamentally.