Convenient self-control defecation device

The invention discloses a convenient self-control defecation device, which relates to the technical field of defecation devices, and comprises a dosing device, an anal tube, an excrement water tank, a negative pressure generating device and a four-way connector, a dosing connector, an anal tube connector, a liquid dung connector and a negative pressure connector which are used for being connected with a dosing device, an anal tube, a liquid dung tank and a negative pressure generating device are arranged in the circumferential direction of the four-way connector, and a rotary valve block matched with the four-way connector in size is arranged in the four-way connector. The rotary valve block is provided with an L-shaped channel used for mutual switching and communication of the dosing device, the anal tube, the excrement water tank and the negative pressure generating device, a rotary handle used for rotation of the rotary valve block is arranged on the outer side of the four-way connector, a top through hole