Objective To explore the balance of the internal structure and the matching between various dimensions of China's serious disease insurance policy, so as to provide theoretical basis for formulating and optimizing China's serious disease insurance system. Methods Multidimensional classification and cross analysis of policy document texts related to serious disease insurance issued from 2012 to 2022 in China were performed by employing content analysis method and quantitative analysis of policy literature based on the three⁃dimensional analysis framework of policy tool, policy objectives and policy intensity. Results In the dimension of policy tool, the application of policy tool was unbalanced and the internal structure was quite different. In the dimension of policy objectives, the policy objectives were focused to a certain extent, but the standardized supervision and evaluation still needed to be further strengthened, and the overall synergy was insufficient. In the dimension of policy intensity, the policy intensity fluctuated little around the overall average effectiveness, showing a wave⁃like forward trend. Conclusion Currently, the using frequency of serious disease insurance policy in organization construction and talent cultivation in China is obviously too low, and the proportion of policy objectives of standardizing supervision and evaluation is also relatively low; furthermore, the pattern of the effective realization of various policy objectives supported by multi⁃departmental joint governance has not yet been widely established, and the overall synergy of policies needs to be further improved. It is recommended to coordinate the use of serious disease insurance policy tools, adjust the internal structure and improve the structure of policy objectives, and strengthen the standardization of supervision and evaluation, so as to improve the coordination of the policy system and optimize the implementation effect.

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