The invention provides a flushing system of a toilet bowl. The flushing system comprises a water tank, a one-way device, a water tank cover, a pilot-operated type electromagnetic valve, a water yield doubler, a water yield doubler pipe, a water inlet piece, a float bowl, an explosion drain valve and a water yield distributor. Due to the fact that a ceramic water tank arranged on a toilet bowl body is removed, a containing cavity is formed in the toilet bowl body, the water tank is divided by a partition plate into a brushing water tank and a flushing water tank, the water tank is contained in the containing cavity, and the size is small. Due to the fact that the one-way device is arranged, the accumulated water in the flushing water tank cannot flow back to the brushing water tank in a short time, and the flushing effect is guaranteed. The yield of water flushing into a brushing pipeline in the brushing water tank is doubled through the water yield doubler and the water yield doubler pipe, and the brushing effect is good. Due to the delay effect of the explosion drain valve and a detecting device, the flushing action is slower than the brushing action after the brushing action is finished, it can be guaranteed that the flushing effect is better when flushing is carried out after brushing is finished. The invention further provides the toilet bowl with the flushing system.