Numerically controlled lathe for processing tubing coupling

The utility model relates to the technical field of numerical control lathes, in particular to a numerical control lathe for tubing coupling machining, which comprises an electric control box, a waste liquid collecting box, a drainage hopper and a numerical control operation box, a blow-down valve is mounted at the lower end of one side of the waste liquid collecting box, and a filter screen is arranged at the upper end in the waste liquid collecting box. A cabinet door is installed on the front side of the numerical control operation box, a clamping seat is installed at one end in the numerical control operation box, a cutting and grinding component is installed at the other end in the numerical control operation box, and a screw rod is arranged at the position, located at the lower end of the cutting and grinding component, in the numerical control operation box. A guide rod is arranged at the position, close to the screw rod, in the numerical control operation box, and a mounting plate is arranged on one s