The development of universities cannot be separated from the allocation of resources. Conduct empirical research on the efficiency of resource allocation in private universities to help them identify the current situation and problems of internal resource allocation, and promote high-quality development. This paper selects the undergraduate teaching status data of eight private undergraduate universities in Guangxi from 2018 to 2022, and uses DEA model to calculate the resource allocation efficiency of eight private undergraduate universities. The results show that the overall level of resource allocation efficiency of eight private undergraduate universities in Guangxi has maintained an upward trend, and the scale efficiency is significantly higher than the pure technical efficiency, which is the main factor affecting the overall efficiency improvement. Therefore, Guangxi private undergraduate universities should optimize the technical efficiency and management efficiency of resource allocation, strengthen professional construction and improve the quality of talent training.