The invention discloses a coating technology for a ship. The coating technology comprises the following steps that 1, repairing and sand blasting are conducted; 2, cabin cleaning treatment is conducted; 3, the portion with the high corrosion requirement is pre-coated; 4, primer glue is sprayed two times, and then drying treatment is conducted; 5, overall coating is conducted, specifically, spraying is conducted two times by adopting epoxy zinc rich primer, ship bottom face primer is sprayed two times by adopting an epoxy anti-corrosion coating, and then spraying is conducted two times by adopting anti-corrosion and anti-fouling finish paint; 6, paint film repairing is conducted; and 7, a paint film is handed over for examination. According to the coating technology for the ship, the technological process is short, the steel surface is subjected to sand blasting treatment and cleaning treatment before being coated, and the portion with the high corrosion requirement is partially pre-coated by adopting the epoxy anti-corrosion coating; and the primer glue is sprayed two times before overall spraying, and the bonding force between the primer and the finish paint and a ship body steelplate is improved in the subsequent overall spraying process. The ship coated through the technology not only has the anti-corrosion and anti-fouling properties of a traditional coating, but also hasthe excellent properties of being not prone to peeling off and capable of preventing cracking and sunlight.