The invention discloses a pretreatment and heat recovery device and a method for an industrial ammonia containing wastewater. A single-tower distillation process is adopted, and a raw material industrial ammonia containing wastewater is subjected to distillation and pretreatment by supercharging secondary steam of a distilled wastewater after flash evaporation as a supplementary steam source, so as to produce a stronger ammonia water product. Meanwhile, through reasonable utilization of a waste heat recovery system, and segmented recovery of low-grade waste heat in the distilled wastewater, gradient utilization of energy is achieved; the operation cost of the device is effectively reduced. The method disclosed by the invention is simple and reliable in technological process; the energy consumption of main products reaches the domestic advanced level; the discharged wastewater temperature and various indexes meet the basic requirements of entering biochemical treatment; a win-win situation of environmental friendliness and economic benefits is achieved.