Welding seam groove milling device

The utility model discloses a weld groove milling device which comprises a main body, a clamping and fixing mechanism, a pressure lifting mechanism and a milling replacement mechanism, the clamping and fixing mechanism is arranged in the bottom end of the main body, the pressure lifting mechanism is arranged in the top end of the main body, and the milling replacement mechanism is arranged at the bottom end of the pressure lifting mechanism. According to the weld groove milling device, in the using process of the device, the base matched with the peripheral size of the main body can keep the whole device stable, before milling operation is carried out, an operator is helped to distinguish the size and specification of a metal plate through the clamping and fixing mechanism, machining program errors caused by accidental operation are prevented, and the working efficiency is improved. The pressure lifting mechanism drives the milling replacement mechanism to carry out milling operation, meanwhile, the situation