The invention discloses a device for controlling liquid circulation based on a magnetic micro valve, and belongs to the technical field of micro flow control. The device comprises a chip, a liquid channel, a magnetic micro valve I, a magnetic micro valve II, a liquid inlet, a liquid outlet I, a liquid outlet II, a glass substrate, a micro channel I and a micro channel II. An electromagnet is usedfor attracting a membrane below magnetic powder to achieve on-off and throttling needs of the micro valves, and the problem that valve closing is not tight is solved; the magnetic powder is adopted todrive the membrane to move so as to close the liquid channel to achieve the aim that the micro valves are controlled to be opened and closed, devices with micro valve structures are arranged on the two sides of the micro channels, opening and closing of the liquid channel aer controlled by controlling opening and closing of the electromagnet, and opening and closing functions of the micro valvesare achieved; the electromagnetic micro valves are good in closing performance, the circulation property is good, the liquid flowing efficiency can be improved, use is simple, cost is low, and the good application prospects are achieved.