The present application discloses a gamma voltage regulation circuit, and a display device. The circuit includes: a gamma voltage input port and a gamma voltage output port; a switching controlling circuit, configured to generate a first control signal or a second control signal according to a timing sequence control signal received; a gamma voltage output circuit, configured to switch on when receiving the first switching signal and to output a first gamma voltage input from the gamma voltage input port to the gamma voltage output port; a gamma voltage processing circuit, configured to convert the first gamma voltage input from the gamma voltage input port to a second gamma voltage when receiving the second control signal and then to output the second gamma voltage to the gamma voltage output port.