Numerical control grinding machine capable of conveniently cleaning chippings

The numerical control grinding machine comprises a fixing frame and a suction fan, a positioning frame is installed at the top end of the fixing frame, sliding rails are installed at the two ends of the fixing frame, a tooth frame is installed inside the sliding rails, a plurality of tooth blocks are installed at the top end of the tooth frame, and the suction fan is installed on the top end of the tooth frame. A gear mechanism used for driving the position of the tooth frame is installed in the fixing frame, empty grooves are formed in the two sides of the top end of the fixing frame, a clamping frame penetrating through the empty grooves is installed at the top end of the tooth frame, a suction fan is installed on one side of the clamping frame, an air suction pipe is installed at the output end of the suction fan, and a filter screen is arranged in the air suction pipe. According to the device, workpieces with different lengths in the middle position are clamped and fixed through the two sets of clamping f