Woodworking engraving machine

The utility model provides a woodworking engraving machine, which belongs to the technical field of engraving and comprises a workbench, a box body arranged on the upper surface of the workbench, a positioning assembly arranged in the box body, an electric telescopic rod arranged below the positioning assembly, and a convenient replacement assembly arranged on the lower surface of the electric telescopic rod. The convenient replacement assembly comprises a first servo motor arranged on the lower surface of the electric telescopic rod, a fixing block is arranged at the output end of the first servo motor, a bearing sleeves the lower surface of the fixing block, a sleeve is fixed to the outer ring of the bearing, an internal thread structure is arranged on the inner wall of the sleeve, a limiting rod is arranged in the center of the interior of the fixing block, and a movable plate is arranged at the lower end of the limiting rod. Three sliding grooves are formed in the bottom face of the movable plate, the end