The utility model discloses a magnetic unloading control and detection system for an artificial heart axial flow pump. The system comprises an instrument and a sensor which are arranged on a magneticaxial unloading blood pump in a test water tank and used for collecting data, a man-machine interaction machine used for collecting and controlling information, and an upper computer used for receiving data information of the man-machine interaction machine and processing the data information, the instrument and sensor, the man-machine interaction machine and the upper computer are connected through a control circuit. The man-machine interaction machine comprises an information acquisition and control cabinet, and a man-machine interaction touch display screen is connected to the top of the information acquisition and control cabinet. According to the utility model, data is automatically acquired through various instruments and related sensors; and then data extraction, analytical calculation, man-machine interaction, storage and the like are carried out, real-time man-machine interaction and calculation are carried out, a curve of flow, rotating speed and unloading capacity is drawn according to test data, the unloading strength approximately reaching magnetic levitation is calculated, and the artificial heart axial flow pump is made to operate in the optimal unloading state.