The utility model relates to the field of machining, especially, relate to an automatic drilling frock, the frock includes from extremely base, electric cabinet and the workstation in the frame is fixed to the last time down, the workstation top is equipped with closing device, gas blowing device and switching device, workstation below rigid coupling has the cylinder, the cylinder is connected with the drilling unit head. Closing device includes the drive arrangement of the anchor clamps of rigid coupling on the workstation and the motion of drive anchor clamps, anchor clamps include the base, with the mould of pedestal connection with compress tightly the connecting rod. Gas blowing device can dismantle on the mouth of blowing and be connected with the gas blow pipe including mouth and the gas blow pipe of blowing. The drilling unit head is equipped with milling cutter. The utility model provides an automatic drilling frock, to the pipe fitting hole with man -hour work piece location accurate, leave out the artifical scraper process of using, reduce artifical intensity of labour, reducing labor time reduces the running cost, guarantees workman's safety to can guarantee the precision of drilling and the uniformity of product, and the assembly is taken conveniently to the frock.