Abstract: Along with the access of a high proportion of renewable energy, the inertia of the new-type power system continues to decline, the dynamic characteristics will qualitatively change, and the safe and stable operation of the power grid is affected. Risk assessment can quantify risks of the power system and is a reliable guarantee for power system security analysis. Therefore, to deeply explore the research methods of risk assessment in the context of new-type power system, this paper summaries the research results of risk assessment in recent years, and emphatically analyzes the theoretical research results of risk assessment in the context of new-type power systems. Firstly, according to the "source-grid- load-storage" model, the risk modeling of energy side, grid side, load side, and storage side is discussed separately, since component-level risk modeling is the basis of power system risk assessment. Secondly, based on the component-level risk modeling, this paper reviews the core algorithm and calculation efficiency of risk assessment, and multi-level probability index system from the three aspects of system-level risk analysis, risk assessment index system, and risk control methods. Finally, the key issues and possible future research directions of new-type power system risk assessment are summarized.