The invention discloses an exhaust gas temperature adjusting device of a waste heat power generation boiler of a glass kiln. A low-pressure boiler barrel (7) and low-pressure evaporators (5) are connected through pipelines so as to constitute a low-pressure evaporation circulating deoxidation system, and a high-pressure boiler barrel (8) and evaporators (3) are communicated through pipelines so as to gather steam. A connection pipeline on the water inlet sides of coal economizers (4) is provided with a by-pass valve (10) and a by-pass pipeline (9) which are used for disconnecting the coal economizers (4), the barrel wall of the high-pressure boiler barrel (8) is provided with a saturated steam pipe (11) and a steam adjusting valve (12), the saturated steam pipe (11) is communicated with the low-pressure boiler barrel (7), and flue gas pipes (13) which are directly communicated with each other are arranged in a high-temperature flue gas area and a low-temperature flue gas area of a waste gas boiler (1). The low-pressure evaporation circulating deoxidation system has an enthalpy difference by adjusting system heat exchange parameters; by disconnecting the coal economizers (4), saturated steam is supplied to the low-pressure boiler barrel (7), and high-temperature flue gas in the high-temperature flue gas area of the waste gas boiler (1) is directly guided into the low-temperature flue gas area; thus, the exhaust gas temperature is controlled within a required range, heat balance of the low-pressure evaporation circulating deoxidation system is achieved again, and the whole waste gas boiler is in heat balance.