Abstract: In recent years, China has accelerated the development of oiltea camellia industry and promoted the expansion of oiltea camellia cultivation nationwide, necessitating a refined agricultural climate zoning for oiltea camellia cultivation across the country. Considering soil factors is crucial for enhancing the precision of agricultural climate zoning for oiltea camellia. Therefore, based on the selection of potential climate factors affecting oiltea camellia cultivation distribution, as well as land conditions such as slope and soil thickness, dominant climate factors are analyzed using maximum entropy (MaxEnt) model and ArcGIS technology. It provides a refined climate zoning of oiltea camellia cultivation in China based on the joint effect of climate and land, identifying the potential for expansion and offering a scientific basis for the planning and implementation of oiltea camellia expansion. Results indicate the dominant climate factors affecting oiltea camellia cultivation distribution in China are the average temperature in January, accumulated temperature above or equal to 10 ℃, consecutive days with minimum temperature equal to or below -10 ℃, and annual cumulative precipitation. Taking into account the impact of slope and soil thickness on climatic suitability analysis, the climate zoning for oiltea camellia is divided into four suitability levels: The most suitable, more suitable, suitable region, and unsuitable region. The area for the most suitable region is 3.003×10⁷ hm², more suitable region is 2.858×10⁷ hm², and suitable region is 1.458×10⁷ hm².The precision of regional climate zoning for oiltea camellia cultivation is enhanced, reducing the suitable planting area for oiltea camellia by two-thirds compared to those not considering land factors. Suitable cultivation areas for oiltea camellia in China are in the region south of Yangtze River, especially from Sichuan Basins to the Qinling Mountains to the south of Huai River, and the east of Yungui Plateau to the coastal areas. Compared to the current planting area and range, oiltea camellia in China has significant potential for expansion. The potential planting boundaries, considering the joint effect of climate and land, tend to be further north. It suggests significant potential for expansion in the distribution of oiltea camellia in China. Therefore, when planning the layout of oiltea camellia cultivation, in addition to considering major planting areas such as Hunan, Jiangxi, Guangxi and Hubei, provinces with significant expansion potential such as Yunnan, Sichuan, Guangdong and Chongqing should also be taken into account, and their planting areas should be appropriately increased.