Antifouling paint for coating bottom of steel ship and preventing cracking

The invention discloses an antifouling paint for coating the bottom of a steel ship and preventing cracking, which is prepared from the following components in parts by weight: 10-25 parts of chloro-ether resin, 15-25 parts of epoxy-ester resin, 10-20 parts of rosin, 5-10 parts of pigment, 20-50 parts of antifouling agent, 1-3 parts of auxiliaries and 5-20 parts of mixed solvent, wherein the chloro-ether resin contains chloroethylene and isobutyl vinyl ether; the epoxy-ester resin contains fatty acid and bisphenol A epoxy resin; the antifouling agent contains cuprous oxide and thiram algicide; the auxiliaries include a wetting dispersant and an antifoaming agent; the mixed solvent contains xylene and 200# coke solvent. Without internally-forbidden toxic materials, the antifouling paint meets the state environmental protection requirements, and the antifouling period reaches 1-3 years; the antifouling paint has the characteristics of good anti-cracking property, rare falling and the like, can overcome the shortcomings that the existing antifouling paint easily gets crispy, is not environment-friendly and the like, and is mainly applied to the antifouling treatment of the bottom of a steel ship.