The invention discloses a stomach and intestine pressure reduction device for nursing. The stomach and intestine pressure reduction device comprises a pressure reduction casing, a drainage tube, an air suction tube and a suction pump, wherein the pressure reduction casing is of a structure with an opening at the top; a top cover is arranged at the top of the pressure reduction casing; a separationplate is arranged in the pressure reduction casing; the pressure reduction casing is divided into an exhausting chamber and a liquid collecting chamber through the separation plate; a plurality of ventilation holes are formed in the middle upper part of the separation plate; the suction pump is connected with one end of the air suction tube; the other end of the air suction tube passes through the top cover, then extends into the pressure reduction casing and communicates with the exhausting chamber; one end of the drainage tube passes through the top cover, then extends into the pressure reduction casing and is communicated with the liquid colleting chamber; the other end of the drainage tube extends to the outer side of the pressure reduction casing and is the free end; a liquid discharging pipe is arranged on the side surface near the bottom in the liquid collecting chamber; a control valve is arranged on the liquid discharging pipe; the liquid discharging pipe is connected with acollecting bag through a bent pipe. The stomach and intestine pressure reduction device has the advantages that the structure is simple; the use is convenient; the carrying is convenient, and the like.