The invention discloses a room-temperature hot-air drying dehydration processing method for a fresh bitter gourd. The method comprises the following steps: a), the fresh good-quality bitter gourd with thick flesh, moderate maturity and green skin and without mechanical damage, scabs, insect pests and standard-exceeding pesticide residues is selected; b), the bitter gourd is washed with clear water, cut in half, subjected to pulp removal, seed removal and removal of two ends, sterilized and cut into 0.5-cm thick pieces, and then the bitter gourd pieces are washed again, fished out and drained for standby application; c), the bitter gourd pieces are dispersed on a multi-layer stainless steel layered rack, the whole rack is pushed into a drying chamber of a dehydrator, and the bitter gourd pieces are subjected to dehydration drying at the hot air temperature of 30-50 DEG C for 5-6 h, cooled at the room temperature, packaged and put into storage. According to the method, soaking, color protection and high-temperature drying links are omitted, the original nutrients as well as color, aroma and taste of the bitter gourd are kept to the greatest extent, a product can be stored for a long time, the variety of bitter gourd food is enriched, the storage life and the supply period of the bitter gourd are prolonged, the demand for eating the gourd throughout the year is met, and the bitter gourd is convenient to store and eat.