The invention discloses a normal-temperature low-dew-point runner dehumidification unit. The normal-temperature low-dew-point runner dehumidification unit comprises a first-level runner heat exchanger, a second-level runner heat exchanger, a front surface air cooler, a middle surface air cooler, a rear surface air cooler, a first-level regeneration heater and a second-level regeneration heater. Afirst-level treatment moisture absorbing area and a first-level regeneration desorption area are arranged in the first-level runner heat exchanger in a distinguished manner. A second-level treatment moisture absorbing area, a second-level regeneration desorption area and a second-level regeneration cooling area are arranged in the second-level runner heat exchanger in a distinguished manner. Freshair sequentially passes through the front surface air cooler and the first-level treatment moisture absorbing area to mix with return air to be divided into two paths, one path of mixed air sequentially passes through the middle surface air cooler, the second-level treatment moisture absorbing area and the rear surface air cooler to be conveyed to a drying area, and the other path of mixed air sequentially passes through the second-level regeneration cooling area, the first-level regeneration heater, the second-level regeneration desorption area, the second-level regeneration heater and the first-level regeneration desorption area and then is exhausted out of a room. The runner dehumidification unit is stable in airflow, the integral pipeline pressure is balanced, energy saving and consumption reducing are achieved, and the work condition is stable.