The utility model provides a waste heat utilization device of tail low-temperature smoke of a sinter cooler. The waste heat utilization device of the tail low-temperature smoke of the sinter cooler comprises the sinter cooler, a third cold zone chimney and a fourth cold zone chimney which are located at the tail of the sinter cooler are connected through a smoke recovery pipe, and the smoke recovery pipe is connected with an air inlet of a waste heat boiler through a smoke inlet header pipe. A first control valve is installed on the smoke recovery pipe between the smoke inlet header pipe and the third cold zone chimney, a second control valve is installed on the smoke recovery pipe between the smoke inlet header pipe and the fourth cold zone chimney, and control valves are installed on the cold zone chimneys. An air outlet of the waste heat boiler is connected with a bleeder, a draught fan and a blow-off valve are installed on the bleeder, a circulating pipe is arranged on the bleeder between the draught fan and the blow-off valve, the circulating pipe is connected with a bellows of the sinter cooler, and a circulating valve is installed on the circulating pipe. The waste heat utilization device can recycle heat of waste gas exhausted from the third cold zone and the fourth cold zone of the sinter cooler, and not only saves energy, but also reduces the effect on the environment caused by smoke emission.