Hydraulic type automatic scrap grabbing device for numerical control machine tool

The utility model provides a hydraulic type automatic scrap grabbing device for a numerical control machine tool. The hydraulic type automatic scrap grabbing device comprises a multi-claw connecting rod, a cylinder body, a piston rod and a spring. A cavity for arranging the spring and the piston rod is formed in the cylinder body; the cylinder body can be fixedly mounted on a tool rest of the numerical control machine tool; a cylinder cover is hermetically mounted at the opening of the cavity; the cylinder cover is provided with a through hole for the piston rod body to move and is in sliding sealing fit with the piston rod body; a cooling liquid flow channel is formed in the cylinder body, and after the cylinder body is installed on the knife rest, an inlet of the cooling liquid flow channel is connected with a cooling liquid nozzle in the knife rest in a sealed mode; the inner end of the piston rod is in sliding sealing fit with the wall surface of the cavity; a compression spring is mounted between the pis