The invention discloses a 3D scanning, printing and laser engraving integrated machine. The integrated machine comprises three stand columns, an upper tripod, a lower tripod, a scanner, a printing head and a laser head, wherein the upper tripod is arranged at the top ends of the stand columns, and the lower tripod is arranged at the bottoms of the stand columns; the scanner is installed in the middles of the stand columns which are provided with guide rails, a slider is installed on the guide rails in a sliding mode, a wire feeding motor and a stepping motor are installed on the upper tripod, and the stepping motor drives the slider to move on the guide rails in the vertical direction; the slider is connected with a carbon fiber tube, the other end of the carbon fiber tube is connected to a fixing block, and the printing head and the laser head are fixed to the lower portion of the fixing block; a control panel is arranged on the lower tripod, a rotating platform is installed on the upper portion of the lower tripod and rotates forwards and reversely through a rotating platform driving motor. The integrated machine integrates 3D scanning, printing and laser engraving, and spatial position is saved while multiple functions are achieved; operation is convenient, and more operation time is saved.