[Aim] The star scale Ceroplastes stellifer is an invasive alien pest that has not been systematically investigated in mainland China since its discovery in 2013 in Menglun Town, Xishuangbanna, Yunnan Province. Therefore, in this study, we studied its distribution and damage in Yunnan Province, which can provide useful information for its monitoring and management. [Method] The distribution, host, damage, and biological characteristics of C. stellifer were investigated from October 2016 to September 2021 in 64 counties of Yunnan Province. [Result] Our survey found nine C. stellifer localities, which were distributed in seven counties of Yunnan Province: Jinghong, Mengla (Menglun and Mohan town), Menghai (Daluo Town), Ning'er, Yingjiang (Nabang Town), Hekou, Jinping (Mengla town and Zhemi town). Except for Ning'er, all the other localities are located on the borderline, indicating a multi-point invasion pattern. This insect was found to feed on five plant species from four genera of four families, including two economic species, mango, and wax apple. C. stellifer mostly parasitized the back of the leaves, along the veins. It had multiple generations in a year. The population density was 185-250 per leaf on the Ixora chinensis. Each female could lay 38-50 eggs. [Conclusion] C. stelliferwas distributed sporadically in Yunnan province and has not caused severe damage. However, this pest tends to spread farther and more expansive and warrants further attention.