The invention discloses cassava starch organic circular biocontrol bacterial fertilizer. The cassava starch organic circular biocontrol bacterial fertilizer includes parts A and a part B, the parts Aare each in a rod shape, and the part B is in a strip shape; the parts A are prepared from the components in parts by mass: 300-500 parts of cassava starch, 100-150 parts of biomass carbon, 2-5 partsof bacillus subtilis and 2-5 parts of bacillus pumilus; the B part is prepared from cellulose; and the multiple parts A are arranged in the length direction of the part B and connected with the part B. The cassava starch organic circular biocontrol bacterial fertilizer takes the cassava starch as a fermentation substrate, is singular in raw material, does not contain heavy metal, is good in stability and high in safety, can improve the physical and chemical properties of soil and adjust the proportion of beneficial microorganisms in the rhizosphere soil, can completely replace chemical pesticides and chemical fertilizer, and is the first choice for constructing an import and export base and producing pollution-free vegetables.