The invention relates to a
punching device having a protection function. The
punching device having the protection function comprises a bottom seat, a lower case, an upper case, a placing mechanism, atemperature reducing mechanism, a lifting mechanism, a lifting plate, an electromotor, a
drill rod and two vertical plates, wherein the placing mechanism comprises a platform and two support assemblies, the temperature reducing mechanism comprises a water tank, a sealing plug, a
backflow pipe, a water pump and a plurality of temperature reducing assemblies, and each temperature reducing assemblycomprises a spray head and a temperature reducing
pipe. The
punching device having the protection function can drive the upper case and the lower case to move close to each other through a drive mechanism so as to form a sealed
processing environment, prevents that chippings spatter and harm surrounding personnel, guarantees
processing safety, drives the placing mechanism to fix a workpiece, prevents the workpiece from shaking and offsetting, uses the temperature reducing mechanism to spray out water
stream for absorbing heat of the workpiece and the
drill rod so as to realize temperature reduction, prolongs life of the
drill rod, improves
processing accuracy, prevents the water
stream from spattering to the exterior due to the fact that the water
stream is sprayed in sealed environment, facilitates recycle of the water stream for repeatedly absorbing heat and reducing temperature, and improves practicability of the device.