The invention discloses a digestive tract pressure detector for the digestive system department. The digestive tract pressure detector comprises an inner layer hose, the upper portion and the lower portion of the inner layer hose are connected with the inner wall of an outer layer hose in a sliding mode, the lower portion of the outer side surface of the outer layer hose is connected with a sliding hole of an arc block in a sliding mode, arc grooves are formed in the front side surface and the rear side surface of the arc block respectively, a first air vent formed in the lower portion of the inner layer hose is communicated with an air vent of a digital display barometer through a first catheter, the first air vent formed in the lower portion of the inner layer hose is communicated with an air vent of a medical air bag through a second catheter, a control valve is installed at the lower end of the inner layer hose, the upper end of the inner layer hose is communicated with the air vent of the air bag, teeth of a patient are placed in the arc grooves, the phenomenon that the patient bites the outer layer hose is prevented, and then the safety of the digestive tract pressure detector for the digestive system department is improved; the side surface of a clamping column is connected with a clamping groove of an elastic block in a clamping mode, one end of the clamping column is connected with the nearest clamping base, shaking of the inner layer hose is prevented, and then the detection precision is improved; medical staff can master the moving distance of the inner layer hose conveniently through scales.