Oil cylinder welding clamp

The utility model discloses an oil cylinder welding clamp which comprises a bottom plate, a clamping mechanism is arranged on the upper end face of the bottom plate, and a positioning mechanism is arranged on the upper end face of the clamping mechanism. The oil cylinder is simple in structure and reasonable in design, clamping and positioning can be completed through the gravity of the oil cylinder body through cooperation of the dampers, the side plates and the clamping plates, the positioning process is simplified, the positioning efficiency is improved, in addition, compared with an existing electric drive positioning mode, a power source is not needed, normal operation can still be conducted under the emergency situation, and the working efficiency is improved. In addition, the oil cylinder body can be further longitudinally positioned through cooperation of the large-head screw and the advancing and retreating plate, displacement of the oil cylinder body in the welding process is prevented, on the other