In order to optimize the integrated packaging of unitized emergency materials, a cloud model was introduced for comprehensive evaluation, and the feasibility of this method was verified. The optimal package scheme is determined by constructing a unit evaluation index focusing on functionality, economy, environmental protection and security. The index weight is calculated by combinatorial weighting, and the index evaluation cloud and index comprehensive cloud are calculated by cloud model. The results of model simulation verification show that the evaluation effect of unitized emergency material assembly constructed by the cloud model is excellent, which can provide a reference for the unitized design of emergency material assembly.