Miniature water pump capable of increasing water flow

The utility model discloses a miniature water pump capable of increasing water flow, which relates to the technical field of water pumps and comprises a driving motor, an upper cover provided with a water inlet and a water outlet and a bottom cover capable of being connected with the upper cover, the upper cover and the bottom cover are connected to form a shell, and a drainage unit is arranged in the shell. The drainage unit comprises an umbrella pin, a valve plate, a leather cup, a swing frame and a cylinder body which are sequentially arranged from the upper portion to the lower portion of the shell, the swing frame can do reciprocating eccentric swing motion in the axis direction of the swing frame, the swing frame is arranged on a connecting part formed on one side of the leather cup in a sleeving mode, and a plurality of evenly-distributed cavities are formed in the other side of the leather cup; according to the miniature water pump, the through holes are formed in the positions, corresponding to the c