The invention relates to the technical field of machines. A self-regulation type dysphagia balloon dilatation pressure control device comprises a water inlet pipeline, a water storage groove, an automatic water draining pipeline system and a water collecting groove; a water outlet of the water inlet pipeline exactly faces the water storage groove; an outlet is formed in the bottom of the water storage groove, a valve is arranged at the outlet, and a joint used for being connected with a dilatation pipe provided with a balloon is arranged at the outlet; the automatic water draining pipeline system is erected on the water storage groove and comprises a U-shaped pipeline in an inverted U shape, a circuitous pipeline, a tee joint and a water draining pipe; three joints of the tee joint are respectively connected with the water outlet of the U-shaped pipeline, the water outlet end of the circuitous pipeline and the water inlet end of the water outlet pipeline. According to the device, the outlet of the water storage groove is directly connected with the dilatation pipe, therefore water pressure in the balloon is controlled by the liquid level of the water storage groove, and through thestructural arrangement of the automatic water draining pipeline, the liquid level in the water storage groove can always be in a set range conveniently.