In order to efficiently manage and conserve wildlife, it is important to understand the impact of environmental factors on their spatial distribution, assess the habitat suitability, and predict potential distribution areas for wildlife. South China Sika Deer (Cervus pseudaxis), listed as a Category I Key National Protected Wild Animal Species, is only distributed in small areas in Anhui, Zhejiang, and Jiangxi Province. The Qianqingtang Area of the Qingliangfeng Nature Reserve in Zhejiang is one of the important distribution areas of the species, but the small area severely restricts its population development. Therefore, it is urgent to evaluate the habitat quality of the Qianqingtang Area and the surrounding areas to provide important implications for the species conservation and wild release. In this study, infrared cameras were used to monitor occurrences of Sika Deer in the Qianqingtang Area, and field surveys and remote sensing techniques were used to obtain eight environmental factors quantifying the terrain, vegetation, water sources and human disturbance. Maximum Entropy Model (MaxEnt) was used to construct a suitability model for Sika Deer within the 50 km×50 km area with the Qianqingtang Area as the center. The results showed that Sika Deer preferred to choose relatively gentle areas at an altitude of 1050-1240 m, 100-900 m from the road and 3200-3800 m from the populated area. The habitat within the Qianqingtang Area was well protected, and the suitable habitat area is 2224 hm², accounting for 39.1% of the area. Suitable habitats were also found in a mountainous area located about 10 km southwest to the Qianqingtang Area which may provide a potential suitable habitat of 3253 hm² for the deer. To promote the population increase of Sika Deer, we suggested reduction of the human disturbance inside the Qianqingtang Area and wild release of some captive deer to the mountainous area in the southwest.