Steel pretreatment device for ship construction

The invention discloses a steel pretreatment device for ship construction. The steel pretreatment device comprises a multi-roller steel plate leveler for straightening steel, a polishing mechanism for polishing the surface of the steel and a transfer mechanism arranged between the multi-roller steel plate leveler and the polishing mechanism. The transferring mechanism sequentially comprises a fixing mechanism used for fixing steel, a lifting frame used for supporting the fixing mechanism and a base used for supporting the lifting frame from top to bottom, the fixing mechanism comprises a rotating frame and clamping mechanisms arranged on the two sides of the rotating frame, walking wheels are arranged at the bottom of the base, and a track is arranged on the ground. In the steel pretreatment process, firstly, steel is straightened through the multi-roller steel plate leveler, the straightened steel is conveyed to the upper end of the rotating frame and clamped through the clamping mechanism, then the base wal