The invention discloses a vacuum auxiliary toilet bowl with a delayed air exhaust closing system. The toilet bowl comprises a toilet bowl base, a water tank, a washing pipeline, a vacuum source and the delayed air exhaust closing system, wherein the water tank is used for supplying water into the toilet bowl base at the beginning of washing, the washing pipeline is used for carrying water towards the downstream direction to a sewer, the vacuum source is exerted on a bend channel at the toilet bowl washing period, and the delayed air exhaust closing system is connected to a bend and used for controlling opening and closing of a vacuum source channel circularly. The vacuum auxiliary toilet bowl is characterized in that the delayed air exhaust closing system is in the opened state at the initial state of toilet bowl washing so that the pumping force of the vacuum source to the bend channel can be guaranteed, the delayed air exhaust closing system is in the closed state at the later period of toilet bowl washing so that the dirt can be prevented from entering the water tank, and the occurrence that due to the fact that the inlet valve siphoning is invalid, the dirt enters a water supply system is prevented. By means of the toilet bowl with the structure, water can be effectively saved, the water pollution caused by the fact that the dirt enters the water supply system is prevented, and the insufficient water seal caused by excessive siphoning is prevented.