The utility model relates to an anti-corrosive structure of an anchor device, comprising an anchor plate (6), a clamping piece (7) and anti-corrosive grease (5), wherein, a plurality of through holes are arranged inside the anchor plate (6); the back section of the through hole is of a straight hole, and the front section of the through hole is of a taper hole; the clamping piece (7) clamps a steel stranded wire (1) and then is wedged in the taper hole of the anchor plate, and the front end of the clamping piece (7) is exposed. The anti-corrosive structure is characterized in that an oil storage tank (4) is concavely arranged on the back end face of the anchor plate (6), and an oil filling opening (3) is radially arranged at the back end of the anchor plate (6) in the direction from the periphery of the anchor plate (6) to the oil storage tank (4); the oil filling opening (3) is communicated with the oil storage tank (4), and a sealing device (2) is arranged outside the oil storage tank (4) at the back end of the anchor plate (6); the anti-corrosive grease (5) is filled in the oil storage tank (4) at the back end of the anchor plate (6) and on the exposed clamping piece (7) at the front end of the anchor plate (6). The utility model has simple structure, good anti-corrosive effect and convenient use, and can be widely used for steel stranded wire clamping piece group anchor in projects such as cable-stayed bridge, external tendon, ground anchorage and the like.