Seven species of the crab-spider family Thomisidae from Medog, Xizang, China are described here, including six new species: Camaricus medog Wang, Lu & Zhang, sp. nov. (♂♀), Monaeses xizang Wang, Lu & Zhang, sp. nov. (♂♀), Sinothomisus beibeng Wang, Lu & Zhang, sp. nov. (♂♀), Sinothomisus dawai Wang, Lu & Zhang, sp. nov. (♂♀), Spilosynema motuo Wang, Lu & Zhang, sp. nov. (♂♀), and Thomisus yarang Wang, Lu & Zhang, sp. nov. (♂♀). The male of Pharta xizang Liu & Yao, 2023 is described here for the first time. Descriptions and photographs of all the species are provided.