The invention relates to a method for rapidly improving the temperature of the annular cold flue gas, so that the flue gas temperature of the sintered annular cold in the short-time shutdown period ismaintained above 300 DEG c. The specific scheme is as follows, 1) before the sintering machine is stopped, the annular cold speed ratio is reduced by 6-7%, the machine speed of the sintering machineis increased by 5-7%, the thickness of the material layer of an annular cooler is improved by 30-40 mm, sintering end point positions move back 0.5 to 0. 6 windbox positions; the press-in amount of the machine head cloth is increased by 10-15 mm, after the part to be pressed is increased in amount reaches the tail of the machine tail, the structure is stopped; 2) after the sintering machine is shut down, the main suction frequency conversion number is immediately closed to 670-700 r/min, a main air draft door is closed immediately; the opening degree of the air door of the high-temperature section of the annular cooler is reduced to 40%-50%, all the air doors are opened when the air door is started again; 3 ) after being restarted, the speed ratio of the sintering machine is increased by 5%-10% before the speed ratio of the sintering machine is shut down, the temperature of the sintering large flue waste gas is controlled between 110 DEG c to 120 DEG c, the sintering main air draft door is gradually opened. According to the method for rapidly improving the temperature of the annular cold flue gas, the influence of short-time shutdown on the waste heat power generation system is relieved, and the power generation capacity of the sintering waste heat is improved.