The invention discloses a water pump vibration power generation device based on the piezoelectric effect. The water pump vibration power generation device based on the piezoelectric effect comprises avibration amplitude amplification mechanism, the input end of which is fixedly connected with a water pump; the output end of the vibration amplitude amplification mechanism is in driving connectionwith a frequency reduction device; the driving end of the frequency reduction device rotates at the frequency, which is lower than the vibration frequency of the water pump, so that a piezoelectric device is driven to extrude a piezoelectric component in the piezoelectric device to generate power; the vibration amplitude amplification mechanism can perform vibration amplitude amplification of high-frequency small vibration amplitude of the water pump; the fact that the vibration amplitude of the water pump can be converted and utilized can be ensured, wherein the frequency reduction device ismainly used for preventing the piezoelectric component from being subjected to high-frequency impact; therefore, the whole device has the reliable service life; simultaneously, the kinetic energy of vibration of the water pump is recovered, so that illumination is realized; and building energy conservation is further realized.