Hydraulic oil tank of excavator

The utility model discloses a hydraulic oil tank of an excavator, comprising a tank body, an oil-absorbing filtering element assembly, an oil-return filtering element assembly and an oil-absorbing bent pipe, wherein the oil-absorbing filtering element assembly and the oil-return filtering element assembly are respectively arranged in the tank body and are separated by an oil tank clapboard; the oil-absorbing bent pipe is arranged at the bottom of the tank body, one end of the oil-absorbing bent pipe is communicated with the output end of the oil-absorbing filtering element assembly, and the other end thereof is communicated with a hydraulic pump by a pipeline; a butterfly valve is also arranged between the oil-absorbing filtering element assembly and the oil-absorbing bent pipe, one end of the butterfly valve is fixedly connected with the lower end of the oil-absorbing filtering element assembly, and the other end thereof is fixedly connected with one end of the oil-absorbing bent pipe. The hydraulic oil tank of the excavator has simple structure and convenient operation, can cut off the connection of the hydraulic oil tank and the hydraulic pump by closing the battery valve so as to maintain the hydraulic pump and the valve, effectively avoids the pollution of the hydraulic oil, guarantees the normal work of a hydraulic system, prolongs the service life of the hydraulic pump and the valve and improves the working efficiency.