The invention discloses a full-automatic keyboard assembling machine. The machine comprises an operation bench. The operation bench is provided with a transmission mechanism. A delivery wheel is installed in the transmission mechanism. The delivery wheel is connected to a motor through a transmission bar. A keyboard main body is placed on the transmission mechanism. The operation bench is fixedlyconnected to a cross beam through a stand column. A top of the cross beam is provided with a hydraulic cylinder. A lower surface of the cross beam is provided with a slide rail. The slide rail is provided with a slide block. The slide block is connected to a fixing device through a lifting rod. The fixing device is connected to a manipulator through a rotation shaft plate. A bottom of the operation bench is provided with a control box. The control box is provided with a numerical control panel. The numerical control panel is provided with a fine tuning controller and a starting switch. In theinvention, the manipulator is installed to automatically assemble a keyboard so that labor intensity and labor cost are greatly reduced, and advantages of high assembling precision and a good assembling effect are realized.