The utility model provides a salvaging device which comprises a central pipe and an unsealing assembly, the central pipe is sleeved with the salvaging assembly capable of expanding in the radial direction to be connected with a packer in a clamped mode, the lower end of the central pipe is connected with a lower connector, a limiting ring is arranged on the upper portion of the outer circumferential face of the lower connector, and a protruding ring is arranged on the lower portion of the outer circumferential face of the lower connector. The unsealing assembly comprises a pressing sleeve, a sliding sleeve and a spring; the spring is sleeved outside the lower joint; the pressing sleeve is sleeved outside the spring and detachably connected with the lower connector, the sliding sleeve is sleeved outside the lower connector and axially movably connected to the lower portion of the pressing sleeve, two ends of the spring respectively abut against the limiting ring and the sliding sleeve,and a sliding block is arranged on the sliding sleeve, can be sleeved outside the protruding ring and radially expands through the protruding ring. According to the fishing device provided by the utility model, in the tripping-in process, when resistance is encountered or the inner diameter is reduced, the sliding block can retract, so that the fishing device smoothly passes through a resistance point or a reducing position, and after the fishing device passes through the resistance point or the reducing position, the sliding block can be rebounded by the spring, and the fishing success rate is improved.