The invention discloses a coal gangue pyrolysis gasification crude gas purified combustion recycling device which comprises a coal gangue pyrolysis device of a gangue pyrolysis gasification device, a water gas reaction device, a crude gas guiding device and an activity coke drying method recycling device; the coal gangue pyrolysis device comprises a pyrolysis vaporizing chamber, an external fuel gas heating device, an internal fuel gas heating device and a gas reversing device; the water gas reaction device comprises a material temperature reduction device and a steam generating device; the crude gas guiding device comprises a crude gas concentrating chamber, an internal guiding channel, an external guiding channel, a guiding main channel and a guiding annular channel; the guiding annular channel is provided with a crude gas guiding port; the activity coke drying method recycling device comprises a recycling device shell, an adsorption cabin, an unsaturated activity coke intake cabin and a saturated activity coke storage cabin; the upper part of a shell of the recycling device is provided with a purified gas output pipe, and the lower part of the shell of the recycling device is communicated with a second gas conveying pipe; the second gas conveying pipe is communicated with a crude gas guiding port; and a purified gas output pipe is communicated with a gas fan of a gas reversing device.