The invention belongs to the technical field of heat recovery and particularly relates to a solid waste heat recovery system. The solid waste heat recovery system comprises a material bin, two cyclonedust collectors, a waste heat boiler, a cloth bag-type dust collector and a circulating fan, wherein the first cyclone dust collector is connected with the material bin through a first pneumatic transmission pipe, the second cyclone dust collector is connected with a solid outlet of the first cyclone dust collector through a second pneumatic transmission pipe, the waste heat boiler is connected with the first cyclone dust collector and the second cyclone dust collector, inlets of the cyclone dust collectors are connected with the waste heat boiler, and outlets of the cyclone dust collectors are connected with the first pneumatic transmission pipe and the second pneumatic transmission pipe. Sensible heat in a high-temperature powdery material product is effectively recovered by the system,energy is saved, the consumption is reduced, the whole system achieves cyclic utilization and has no pollution to the outside, environmental pollution is reduced, and meanwhile the problem of difficult high-temperature solid product conveying is solved.