The invention provides a cupping device for flexibly adjusting in-
tank pressure. The device comprises cups, spring pipes are fixedly communicated with the upper ends of the cups, and cupping flexible pipes are fixedly communicated with the upper ends of the spring pipes;
branch pipe air valves are evenly arranged on the cupping flexible pipes, a negative-pressure cavity is fixedly communicated with the upper ends of the cupping flexible pipes, and fixing holes are evenly distributed on an adjusting plate; a negative-pressure
machine is fixedly arranged on the adjusting plate, the negative-pressure
machine is fixedly communicated with the negative-pressure cavity through an extraction
pipe, and an
air cavity is fixedly communicated with the other end of an air inlet
pipe. According to the cupping device, one of the
branch pipe air valves is opened in
physical therapy, and the negative-pressure
machine is started, so that the negative-pressure cavity is in a negative pressure state; the negative-pressure cavity is communicated with the cups through the cupping flexible pipes, so that the cups are in the negative pressure state, the cups are attached to the
skin surface of a patient, and then the
branch pipe air valves on the cupping flexible pipes are closed; when the device needs to be adjusted, a main pipe air valve is opened, so that the negative-pressure cavity is in an
atmospheric pressure state, then the branch pipe air valves on the cupping flexible pipes are slowly opened, and the air pressure in the cups can be adjusted.