The invention belongs to the technical field of metal cutting devices, especially an automatic metal cutting device. Aiming at the problems of low cutting efficiency, low precision, high labor intensity, high risk and low degree of automation in the prior art, the following proposals are now made: The scheme includes a cutting table, and the cutting table is a hollow structure. A through hole is opened on the top of one side of the cutting table, and a moving plate is slidably connected in the through hole. Two moving holes are symmetrically opened on the top of the cutting table. In the invention, starting the servo motor can not only drive the moving plate to move to realize the effect of automatic feeding, but also realize the effect of automatic clamping of the plate through the cooperation of the pressing rod and the pressing plate during the feeding process, and realize the automatic clamping effect by rotating the block. The effect of unloading, the whole process is highly automated, the operation is simple, no manual feeding is required, the labor intensity is low, the safety is high, and the cutting efficiency and cutting accuracy are greatly improved.