The work aims to develop a forced-air pre-cooling component with high space utilization and fast precooling speed to solve the problems of low total amount of fruits and vegetables per unit space and slow precooling speed of tunnel differential pressure precooling equipment. Through digital simulation, it was determined that two static pressure boxes and four fans were installed on the side of the cold chain box, which increased the stacking space of goods during precooling. The precooling was carried out by air supply, which increased the air velocity in the tunnel, reduced the pressure in the tunnel, increased the pressure difference on both sides of the fruit and vegetable turnover box, increased the speed of wind passing through the fruits and vegetables, and shortened the precooling time. The results showed that the temperature of 56 baskets of Chinese cabbage was reduced from 22.63 ℃ to 5 ℃ in 138 min with energy consumption of 10.37 kW.h. The precooling uniformity was within ±2 ℃. Compared with the traditional suction precooling, the time of air supply precooling is shortened by 21%, and the energy consumption is reduced by 14%. The energy consumption of variable frequency air supply is reduced by 4%.