Spot welding device facilitating welding of automobiles of various types

The invention discloses a spot welding device facilitating welding of automobiles of various types. The spot welding device comprises a supporting leg frame, an operation table is fixedly arranged at the top of the supporting leg frame, a fixing clamping plate is fixedly installed at the bottom of the operation table, and a fixing motor is fixedly installed on the inner wall of the fixing clamping plate. According to the spot welding device facilitating welding of the automobiles of various types, under the mutual cooperative use of the fixing motor, a rotating rod, a fixing sleeve, a belt, a fixing column, a belt groove, an electric push plate, a fixed box, a limiting groove, a limiting ring, a movable rod, a fixing ring, an elastic rod, a bearing, an extrusion plate and a protective pad, the extrusion plate extrudes the automobile type, so that the extrusion plate is stressed to compress the elastic rod, then the movable rod is separated from the limiting groove, the fixing column cannot drive the movable r