Micro pump and oral irrigator

The micro pump comprises a pump shell, a magnet, a buffering piece, a first electromagnet and a second electromagnet, the pump shell is provided with a first cavity and a second cavity which are communicated with each other, one end of the pump shell is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both communicated with the first cavity. The first cavity is far away from the second cavity; the piston comprises a piston rod and a piston head connected to one end of the piston rod, the piston head is slidably arranged in the first cavity, and at least part of the piston rod is located in the second cavity. The first electromagnet and the second electromagnet are fixed in the second cavity at intervals in the axial direction of the piston rod, and the piston rod slidably penetrates through inner rings of the first electromagnet and the second electromagnet; the magnet is fixedly connected to the piston rod and located between the first electromagnet and the second