The invention discloses an antifreeze solution for a crusher in a construction site. The antifreeze solution is prepared from the following raw materials in parts by weight: 2-4 parts of sodium benzoate, 6-9 parts of phthalic anhydride, 4-7 parts of sodium phosphate, 0.8-1.5 parts of methyl-1H-benzotriazole, 1-5 parts of dimethyl sulfoxide, 12-15 parts of a silicate stabilizer, 9-14 parts of a corrosion inhibitor, 7-12 parts of phenolic resin, 15-18 parts of sodium citrate, 8-15 parts of methylsilicone oil, 5-8 parts of micro wax, 3-7 parts of sodium nitrite, 7-9 parts of sodium hexametaphosphate, 6.5-9 parts of triethanolamine phosphate, 14-19 parts of a hard water stabilizer, 13-16 parts of fulvic acid and 6-10 parts of polyoxyethylene. The antifreeze solution for the crusher in the construction site can keep the completeness of a protective film on a metal surface so as to inhibit the corrosion of metal, and is characterized in that the antifreezing performance, the rust-proof performance and the scaling resistance are good and the production cost is low.