The utility model discloses an ammonia distillation waste liquid waste heat recovery system which comprises a suspension separation unit, a centrifugal separation unit and a heating medium direct heatremoval unit, ammonia distillation waste liquid firstly passes through the suspension separation unit and the centrifugal separation unit in sequence, and after solid particles in the ammonia distillation waste liquid are removed, the ammonia distillation waste liquid is fed into the heating medium direct heat removal unit for waste heat recovery. According to the utility model, the heating medium direct heating unit adopts a direct heating mode; a mode of direct heat exchange between a heating medium and ammonia distillation waste liquid is adopted, and a heat source medium channel of the ammonia distillation waste liquid in the heat exchanger is of a straight channel contactless plate type structure, so that the problems of particle blockage and scale deposition are solved, low-temperature waste heat recovery of the ammonia distillation waste liquid is realized, and the device has positive effects on reducing energy consumption and reducing environmental pollution.