A complete set of equipment processing high-level waste gas at normal temperature in a retardation manner for a pressurized water reactor nuclear power station is characterized in that the equipment mainly comprises a buffer tank (1), a prefilter (2), a drier (3), a heater (4), a protection bed (5) filled with activated carbon, and at least two retardation beds (6 and 7) connected in series, wherein an air inlet end of the buffer tank (1) is connected with an output end of a tank collecting waste gas through a pipeline, an output end of the buffer tank (1) is connected with an input end of the prefilter (2), an output end of the prefilter (2) is connected with an input end of the drier (3), an output end of the drier (3) is connected with an input end of the heater (4), an output end of the heater (4) is connected with an input end of the protection bed (5), an output end of the protection bed (5) is connected with an input end of the retardation bed (6), an output end of the retardation bed (7) is connected with an input end of an efficient particle filter (8) through a pipeline, and an output end of the efficient particle filter (8) is connected with a corresponding end of a factory building ventilation system (9). The utility model has the advantages of simple structure, less land occupation, energy conversion, low running and maintaining costs, safety and reliability.