Ostomy bag

The ostomy bag comprises a bag body, the surface of one side of the bag body is provided with a sticking opening capable of penetrating through a drainage tube extending out of an abdominal cavity incision, sticking glue is arranged on the periphery of the sticking opening, the side of the bag body is communicated with a bag body extension tube used for penetrating through the drainage tube, and a circulation valve is arranged outside the bag body extension tube. The circulation valve comprises a valve body, a rotating rod and a knob; a through groove penetrating through the opposite face of the valve body is formed in the side face of the valve body, and the bag body extension pipe is fixedly connected with the outer surface of the through groove of the valve body. A through hole communicated with the through groove is formed in the upper surface of the valve body, the rotating rod is rotatably arranged in the through hole, the diameter of the rotating rod is equal to the aperture of the through hole, a circ