The invention provides a voltage tracking type constant current source device, and belongs to the technical field of electronic equipment. The voltage tracking type constant current source device mainly structurally comprises a current setting module (1), an amplitude limit setting module (2), a power output module (3), a load judgment module (4), a delay compensation module (5), a voltage tracking module (6), a power-off protection module (8), a front panel (11) and the like. During work, the device can actively adapt to changes of load, and the device has the advantages of being high in efficiency, wide in load adaption range, high in safety, high in reliability and the like.