Abstract: In view of the management difficulties of “storage difficulty “and “excessive water loss” of high-moisture grain in grain depot and based on the principle of grain conservation in grain storage ecological system, a novel grain storage technology of “surface dry and inner moist, temperature control and water retention” was approached by applying integrated technology of grain storage ventilation, supplementary cooling and temperature control. No. 15 warehouse of Tongchuan grain depot was chosen as test warehouse and No. 16 warehouse as the control. According to the requirements of the novel grain storage technology, the average grain temperature in test warehouse in summer did not exceed 17.5 ℃ by reducing the moisture content of grain pile surface and controlling the low temperature of grain piles, and in late July, two protective operations were carried out to deal with the small number of moth pests, achieving the safe storage with quasi low temperature. Maize in the control warehouse was stored according to the conventional method. In summer, the average grain temperature was higher, and local temperature could exceed 30 ℃. Insects began to grow in June when two protective operations and one fumigation operation were carried out. The verification test on Zhengzhou grain depot was as follows: in March 2019, according to the process requirements of “surface dry and inner moist”, 80 h low-pressure ventilation was carried out for the high-moisture maize in No.9 warehouse. In addition, with air-conditioning control and inner loop flow control, the temperature of maize warehouse was 23 ℃ in the end of August, and the whole grain pile was loose and the grain situation was stable, which avoided the embarrassing situation of repeated heating and insufficient handling. The results showed that: the novel technology of “surface dry and inner moist, temperature control and water conservation” solved the technical problems of grain depot and achieved the purpose of safe storage of high-moisture maize. Meanwhile, the necessity of research on the storage mode of high-moisture grain was discussed, and the application effect, economic benefit, and management of the new storage technology for storing high-moisture grain were analyzed.