The invention relates to a normal temperature fresh air dehumidification device, and belongs to the technical field of ventilation air-conditioners. The normal temperature fresh air dehumidification device comprises a fresh air channel with a fresh air inlet and a fresh air outlet in the two sides, a waste air channel with a waste air inlet and a waste air outlet in the two sides and a heat pump refrigerating cycle system; the heat pump refrigerating cycle system is formed by connecting a compressor, a condenser located at the waste air outlet, a subcooler located on the inner side of the fresh air inlet, a capillary tube and an evaporator located on the outer side of the fresh air inlet in series; and the fresh air channel and the waste air channel are provided with an evaporation coolingdraught fan and a condensate draught fan correspondingly. The normal temperature fresh air dehumidification device effectively solves the problem of refrigeration dehumidification machine high-temperature air outlet, and the energy saving coefficient is effectively improved.