Pilot oil source control valve bank of hydraulic excavator

The utility model discloses a pilot oil source control valve bank of a hydraulic excavator, belonging to the technical field of hydraulic excavators. The pilot oil source control valve bank of the hydraulic excavator comprises a filter, an overflowing valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve as well as a test connector, a first one-way valve, an energy accumulator and a third one-way valve, wherein a port P of the valve body is connected with the filter; the filter is connected with the test connector, a port 1 of the first one-way valve, a port 1 of the overflowing valve and a port 1 of the third one-way valve respectively; and a port 2 of the third one-way valve is connected with a port T of the valve body through a port 2 of the first electromagnetic reversing valve. The utility model has the benefits that the pilot oil source control valve bank of the hydraulic excavator can effectively protect a pilot pump, prolong the service life of the pilot pump and reduce oil consumption.