The invention discloses automatic welding equipment for machining. The automatic welding equipment for machining comprises a base, a rack, a welding power source, a baffle and a hydraulic cylinder. The upper portion of the base is fixedly provided with a workbench, a water storage trough and a storage platform are arranged in the middle of the workbench. The storage platform is arranged above thewater storage trough, and the exterior of the storage platform is fixedly provided with the workbench. The right side of a draught fan is connected with a smoke sucking pipe, a lug is arranged below the smoke sucking pipe, the bottom of the welding power source is provided with a wire feeding mechanism and a welding head, the top end of the wire feeding mechanism is fixedly provided with the welding head, the top end of the hydraulic cylinder is fixedly provided with an extrusion plate, and the storage platform is arranged in the middle of the extrusion plate. The automatic welding equipment for machining is provided with the water storage trough and the water storage platform. The upper portion of the water storage platform is of a mesh-shaped structure, after welding is completed, the water storage trough on the bottom can cool a welded weld assembly very conveniently, and the time for waiting welding slag is shortened for a worker.