NOVELTY - A polypeptide enzyme fertilizer synergist comprises 55-60 pts. wt. liquid polypeptide, 9 pts. wt. glucose, 1.5 pts. wt. propionaldehyde, 0.5 pts. wt. triethanolamine, 10-15 pts. wt. controlled-release agent, 10-15 pts. wt. trace element, 20 pts. wt. demineralized water, 3 pts. wt. polyacrylamide, 3 pts. wt. modified starch, 5 pts. wt. polyvinyl alcohol, 6 pts. wt. phosphate solubilizing bacteria, 5 pts. wt. potassium humate, 5 pts. wt. biological enzyme, and 3 pts. wt. composite bacteria.    USE - Polypeptide enzyme fertilizer synergist.    ADVANTAGE - The synergist is environment-friendly, solves soil and groundwater contamination problems, and it has good microbial degradation effect, and high fertilizer utilization and absorption rate.    DETAILED DESCRIPTION - A polypeptide enzyme fertilizer synergist comprises 55-60 pts. wt. liquid polypeptide, 9 pts. wt. glucose, 1.5 pts. wt. propionaldehyde, 0.5 pts. wt. triethanolamine, 10-15 pts. wt. controlled-release agent, 10-15 pts. wt. trace element, 20 pts. wt. demineralized water, 3 pts. wt. polyacrylamide, 3 pts. wt. modified starch, 5 pts. wt. polyvinyl alcohol, 6 pts. wt. phosphate solubilizing bacteria, 5 pts. wt. potassium humate, 5 pts. wt. biological enzyme, and 3 pts. wt. composite bacteria. The liquid polypeptide comprises 24-26 pts. wt. amino acid, 0.25-0.5 pts. wt. protein zinc, 0.25-0.5 pts. wt. protein magnesium, 0.5-1 pt. wt. metasilicate, and 30-32 pts. wt. deionized water. The controlled-release agent comprises 4-6 pts. wt. trimethylene tetraurea, 4-6 pts. wt. tetramethylene pentaurea, 1-1.5 pts. wt. N,N-butylphosphate triamide, 0.5-0.75 pts. wt. benzene phosphate diamide and 0.5-0.75 pts. wt. cyclohexyl triamide. The trace element comprises 6-9 pts. wt. magnesium sulfate heptahydrate, 1-1.5 pts. wt. ferrous sulfate heptahydrate, 1-1.5 pts. wt. manganese sulfate heptahydrate, 1-1.5 pts. wt. zinc sulfate, 0.5-0.75 pts. wt. sodium borate and 0.5-0.75 pts. wt. ammonium molybdate. The phosphate solubilizing bacteria comprises 2 pts. wt. Bacillus, 0.5 pts. wt. Rhizopus,0.5 pts. wt. Streptomyces, 1 pt. wt. glial bacillus, 2 pts. wt. silicate bacterium, 1 pt. wt. enzyme starch hydrolase, 1 pt. wt. proteolytic enzyme, 2 pts. wt. fiber hydrolase and 1 pt. wt. glycohydrolase. The composite bacteria comprise 2 pts. wt. photosynthetic bacteria strain, 0.5 pts. wt. lactic acid bacteria and 0.5 pts. wt. yeast. The fertilizer synergist is prepared by adding liquid polypeptide and glucose into reaction kettle, heating to 50-65 degrees C, stirring, adding biological enzyme, reacting for 1 hour, heating to 80-85 degrees C, adding propionaldehyde while stirring for 1 hour, and adding triethanolamine; and adding controlled-release agent, demineralized water and trace element, heating to 95-100 degrees C, stirring for 2 hours, cooling to 65 degrees C, adding polyacrylamide, modified starch and polyvinyl alcohol, stirring for 30 minutes, heating to 85-95 degrees C for 30 minutes, adding potassium humate, stirring for 30 minutes, cooling down to 40-50 degrees C, adding enzyme, stirring, adding phosphate solubilizing bacteria, continuously stirring for 1 hour, cooling to room temperature, stirring for 30 minutes, adding composite bacteria, and stirring. An INDEPENDENT CLAIM is included for application of polypeptide enzyme fertilizer synergist comprising spraying fertilizer synergist into light calcium and magnesium material or other filler material at weight ratio of 1:1, extrusion granulating, and low-temperature drying to 50-60 degrees C.