This study comprises a review and key to species of the genus Phytoseius distributed in mainland China, Hong Kong and Taiwan. It deals with 3 subgenera, 8 species groups and 31 species, including a checklist of species, a description of the new species, Phytoseius (Dubininellus) longchuanensis Wu, and six new synonyms in the following: Phytoseius wuxianensis Xin, Liang et Ke as a junior synonym of Phytoseius minutus Narayanan, Kaur et Ghai; Phytoseius jianfengensis Chen, Chu et Zhou as a junior synonym of Phytoseius haweiiensis Prasad; Phytoseius (Phytoseius)shanghaiensis Xin, Liang et Ke as a junior synonym of Phytoseius (Dubininellus) nipponicus Ehara; Phytoseius (Dubininellus) silvaticus Wu et Li as a junior synonym of Phytoseius (Dubininellus) huaxiensis Xin, Liang et Ke; Phytoseius xilingensis Wang et Xu as a junior synonym of Phytoseius (Dubininellus) scabiosus Xin, Liang et Ke; Phytoseius (Phytoseius) mori Xin, Liang et Ke as a junior synonym of Phytoseius (Dubininellus) rubii Xin, Liang et Ke.