Convenient and fast reminding type toilet flushing device using waste water

The utility model discloses a convenient and fast reminding type toilet flushing device using waste water. The toilet flushing device comprises a water collecting device and a water pumping device. The stepping positions at two sides of a urinal are provided with pedals which can move up and down, and water pumping and flushing work can be completed by utilizing the self weight of a human body. The toilet flushing device brings great convenience for users through smart conception, and the flushing work of the urinal can be completed without active operation; in addition, the toilet flushing device has simple structure, low cost and reliability in work; simultaneously, the water collecting device is connected with a water source channel, and rain water in gutters or domestic waste water can be used as flushing water sources, thus saving a large amount of water resources and lowering using cost.