[Aim]  To report the presence of an introduced species Phoracantha semipunctata Fabricius in China, and evaluate the risk posed by this species. [Methods]  Manual investigation, flight intercept traps and Malaise traps were used to collect insects in Eucalyptus forests of Guangdong Province. Identification was based on morphological characters. Risk level was analyzed based on the risk assessment indicator system of invasive species in forest, grassland and wetland ecosystems provided by the National Forestry and Grassland Administration. [Results]  The introduced species P. semipunctata was found to have colonized Guangzhou, Dongguan, Zhongshan and Shaoguan in Guangdong province, and its risk value (P) was assessed as 0.87 in forest, grassland and wetland ecosystems, which is indicative of a low risk pest at present. [Conclusion]  P. semipunctata is a low risk pest in China and sporadically distributed at present, which required enhancement of monitoring and studies on the biology, prevention and control.