The work aims to intuitively master the research progress and hot spots in PHA-related fields and promote the development of PHA field. With the related literature in CNKI and Web of Science in the past ten years as the objects, the knowledge map of PHA research was drawn by the CiteSpace software with the bibliometric method. The annual number of publications of related literature increases continuously, the academic communities in China and abroad are paying more and more attention to the PHA field, and the cross-unit cooperation in the international PHA field is more extensive than that in China. The research power in this field is spread all over the world, among which Tsinghua University, NOVA Univ Lisbon, University of Science Malaysia, University of Queensland, and Brno University of Technology are prominent in their contribution and influence. CHEN Guoqiang is the scholar with the largest number of publications in this field. Keywordanalysis shows that the current focus of attention on PHA is mainly concentrated on mechanical properties, biodegradation, mixed flora, activated sludge, phosphorus and nitrogen removal. In the future research, enhanced modification of PHA based on increasing its structural diversity, extraction of PHA in activated sludge and biological phosphorus removal and nitrogen removal, biosynthesis of PHA, and mixed bacterial colony fermentation will be the future research trends in the field of PHA.