The genus Phlogiellus Pocock, 1897 of the spider family Theraphosidae Thorell, 1869 includes 25 species from Southeast Asia, of which three have been recorded in China (Li 2020): P. bogadeki Nunn, West & von Wirth, 2016 and P. xinping (Zhu & Zhang, 2008) from Hong Kong and P. watasei (Kishida, 1920) from Taiwan. Here, we describe a new Phlogiellus species from Hainan, China: P. quanyui sp. nov. All specimens were preserved in 75% ethanol. Epigynes were cleared in trypsin enzyme solution to dissolve non- chitinous tissues. Specimens were examined under a LEICA M205C stereomicroscope. Photomicroscope images were taken with an Olympus C7070 zoom digital camera (7.1 megapixels). Photos were stacked with Helicon Focus 6.7.1 and processed in Adobe Photoshop CC 2018. The terminology used in the text and figures follows Zhu & Zhang 2008. All measurements are in millimeters. Eye sizes are measured as the maximum diameter from either the dorsal or frontal view. Leg measurements are given as follows: total length (femur, patella+tibia, metatarsus, tarsus). Abbreviations: ALE, ante- rior lateral eyes; AME, anterior median eyes; MOA, median ocular area; PLE, posterior lateral eyes; PME, posterior me- dian eyes. The type material is deposited in the Institute of Zoology, Chinese Academy of Sciences in Beijing (IZCAS).