Electromagnetic metering pump

The invention belongs to the technical field of metering pumps, and particularly relates to an electromagnetic metering pump. A coil is wound on the peripheral face of a shell, static iron and moving iron are installed in an installation cavity of the shell, the static iron is connected with the shell, a plunger is connected with the moving iron, a spring is connected between the moving iron and the static iron, and a fluid cavity, a fluid inlet channel and a fluid outlet channel are further formed in the shell. The fluid cavity is formed in the side, away from the static iron, of the movable iron, the plunger extends into the fluid cavity, the inflow one-way valve structure is arranged between the inflow channel and the fluid cavity, and the inflow one-way valve structure can be opened when the plunger moves towards the static iron so as to communicate the inflow channel with the fluid cavity and can be closed when the plunger moves away from the static iron so as to communicate the fluid cavity with the flu