Negative pressure bloodletting cup for cupping

The utility model relates to the technical field of cupping, in particular to a negative pressure bloodletting cup for cupping, which comprises a cup body, a movable rod and a plug block, a mounting tube is arranged at the top of the cup body, the movable rod is inserted into the mounting tube, a vent hole communicated with the top and the bottom is arranged inside the plug block, and the plug block is connected with the movable rod through a plug. A plug matched with the vent hole is arranged at the bottom of the movable rod, a clamping block used for preventing the movable rod from moving upwards out of the mounting pipe is arranged on the inner wall, close to the top, of the mounting pipe, a blood suction pad is arranged at the bottom of the plug block, and a through hole communicated with the vent hole is formed in the center of the blood suction pad. When the device is used for cupping, the movable rod can be pressed downwards to enable the plug block to fall down from the mounting pipe, namely, the plug