The utility model relates to a tuyere replacing trolley for dismounting a tuyere small sleeve of a blast furnace. The trolley comprises a trolley body, an impactor, a tuyere dismounting device, a supporting rod and a steering wheel device, wherein a hook head is connected to the front end of the tuyere dismounting device. The trolley body comprises a frame, a front bracket, a rear bracket, a steering wheel device, a driving wheel, supporting hydraulic cylinders, a side slide plate and a side slide block. The front and rear brackets are provided with the supporting hydraulic cylinders which lifts the tuyere dismounting device; the front and rear brackets and the tuyere dismounting device are limited through the side slide plate, the front bracket is connected with the tuyere dismounting device through the side slide block, and the upper end of the front bracket is connected with the supporting rod. The trolley has the advantages that the trolley is compact in structure and convenient to use, realizes quick alignment and quick disassembly and conveys the tuyere small sleeve to an appointed place. A tuyere platform is lifted up and down without other tools. The driving wheel is assembled, so that the trolley can agilely steer and move in small space.