Stroke-adjustable automatic welding device

The invention belongs to the technical field of welding, and particularly relates to a stroke-adjustable automatic welding device which comprises a base, and fixing mechanisms used for fixing materials to be welded are installed on the two opposite sides of the base correspondingly. A lifting mechanism, an executing mechanism and a control mechanism are installed on the other two sides of the base respectively, the lifting mechanism is connected with one side of the executing mechanism in a sliding fit mode, and the other side of the executing mechanism is hinged to the control mechanism; the executing mechanism is further provided with a welding mechanism, a starting mechanism used for starting and stopping the welding mechanism and a cutting mechanism used for cutting welding wires. The cutting mechanism is controlled to be started through the trigger mechanism installed on the executing mechanism, the welding device can weld random welding points by changing the welding method and through mutual cooperatio