Plasma cutting machine

The invention provides a plasma cutting machine, and relates to the field of machining. The plasma cutting machine comprises a movable table, a plasma spray head mechanism, a clamping plate, a mounting plate and a storage plate, the storage plate is fixedly connected with the inner wall of the mounting plate, the clamping plate is connected with the outer wall of the top end of the mounting plate, a sliding rail is arranged on the outer wall of the top end of the clamping plate, the movable table is movably connected with the sliding rail, the plasma spray head mechanism is connected with the outer wall of the bottom end of the movable table, a negative pressure fan and a water storage tank are arranged in the movable table, and a water pump is arranged on the inner wall of the bottom end of the water storage tank. According to the plasma cutting machine, impurities are prevented from being gathered and caked in a spray head, so that it is guaranteed that the working effect of the spray head cannot be affecte