Transmission mechanism for laser engraving machine

The utility model relates to a transmission mechanism for a laser engraving machine. The transmission mechanism comprises a movable track, a fixed track and a distance adjusting assembly, a first conveying belt assembly, a second conveying belt assembly and a third conveying belt assembly are continuously arranged on the surfaces of the opposite sides of the movable track and the fixed track; pressing assemblies capable of moving up and down are installed on the outer sides of the two second conveying belt assemblies correspondingly, and stopping assemblies are movably installed at the front ends and the rear ends of the second conveying belt assemblies correspondingly. When the workpiece plate moves to the preset position of the second material moving and conveying assembly, the stopping assembly stops the front end of the workpiece plate to prevent the workpiece plate from continuously moving towards the discharging end, the workpiece plate can be effectively positioned on the second material moving and con