▎ 摘　　要

NOVELTY - Anti-freezing agent comprises component A, component B and component C. The component A includes 10-20 pt. wt. calcium chloride and 40-50 pt. wt. propylene glycol and/or dimethyl sulfoxide. The component B includes 30-50 pt. wt. polystyrene graft-modified graphene oxide, 0.5-1 pt. wt. dispersant and 1-2 pt. wt. curing agent. The component C includes 25-30 pt. wt. paraffin, 8-10 pt. wt. emulsifier, 1-2 pt. wt. surfactant and 65-70 pt. wt. deionized water. USE - The anti-freezing agent is useful for a fire hydrant system. ADVANTAGE - The anti-freezing agent achieves a good enough antifreeze effect, ensures that there will be no residue after use, and can be updated every time the fire hydrant pipe is used, which is more convenient to use. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing anti-freezing agent for fire hydrant system comprising (S1) measuring component C in a 30°C water bath to keep the temperature constant, (S2) providing component B and component C with constant temperature and adding them to the mixer and stirring uniformly, and (S3) providing and mixing component A and adding to the mixer containing components B and C and stirring for 30 minutes.