In order to explore the application of liquid assisted pollination technology in the production of Camellia oleifera, four sample plots were selected successively in Xiushan County and Youyang County in Chongqing, Daoxian County in Hunan and Poyang County in Jiangxi from September 2020 to March 2022, liquid pollination had been carried out successively. Field experiments of artificial liquid pollination and unmanned aerial vehicle(UAV) liquid pollination of C. oleifera were carried out in C. oleifera production, and the difference in fruit setting rate between this technology and natural pollination were calculated, which is the effect of improving fruit setting rate. The results showed that: 1) in Xiushan, Chongqing, Daoxian, Hunan and Poyang, Jiangxi, artificial liquid assisted pollination increased the fruit setting rate of C. oleifera by 24.45%, 25.65% and 14.08%, respectively; 2) after artificial liquid-assisted pollination in Poyang, Jiangxi, there was no statistically significant difference in the fruiting rate improvement effects between different oil tea varieties; 3) UAV liquid assisted pollination could increase the fruit setting rate of C.oleifera by 5.63%~27.01% in Youyang, Chongqing, and the optimal flight height of liquid pollination of UAV was 3.5 m, and the optimal pollen dilution ratio was 0.08%. The results suggest that compared with the traditional natural pollination approaches, liquid assisted pollination can effectively improve the fruit setting rate of Camellia oleifera to make up for the shortcomings of the former; compared with artificial liquid-assisted pollination, UAV liquid-assisted pollination is convenient, simple and fast, and is more suitable for carrying out in large areas of mountainous areas.