Automatic feeding device of punch

The invention discloses an automatic feeding device of a punch. The automatic feeding device is characterized in that width limiting columns are arranged on a positioning platform; a feeding cylinder is fixedly installed in the middle of the positioning platform; a piston rod of the feeding cylinder is fixedly connected with an installation plate; a compression cylinder is installed on the installation plate; a piston rod of the compression cylinder is fixedly connected with an upper transmission block; a lower transmission block is arranged below the upper transmission block and is fixedly connected with the lower end of the installation plate; a working platform is arranged on a punch main body and is fixedly connected with the positioning platform; and a material plate is arranged between the upper transmission block and the lower transmission block and passes through the positioning platform. The automatic feeding device is safe and reliable, has high work efficiency and strong practicability, is simple t