Protective device for hydraulic oil tank

The invention discloses a protection device for a hydraulic oil tank, which comprises a protection unit, a shell assembly connected with the hydraulic oil tank, a dust prevention net arranged at the top of the shell assembly, an elastic bearing assembly arranged in the shell assembly, a filtering assembly arranged in the elastic bearing assembly, and an induction magnetic attraction assembly arranged on one side of the bearing assembly, the positioning unlocking assembly is arranged at the bottom of the filtering assembly. The device has the beneficial effects that the static filtering layer and the dynamic filtering layer are combined for protection, and the overall protection strength is improved; and through the protection unit, the filter pad can be automatically unlocked after being saturated, the bearing table is locked during replacement, disassembly and replacement are facilitated, the oil tank opening is protected after the filter pad loses efficacy and during replacement, and pollution is avoided. 本