Abstract: A comprehensive evaluation method of military training level includes: selecting evaluation indicators of military training level, and establishing an evaluation indicator system of military training level by a multi-tree structure; constructing a leaf node evaluation indicator fusion model including a time indicator fusion model and a quality indicator fusion model, and performing multi-source data fusion processing on leaf node indicator data through the leaf node evaluation indicator fusion model; constructing a leaf node evaluation indicator model of military training level; constructing a parent node evaluation indicator model of military training level based on weight information of evaluation indicators of military training level of nodes in the multi-tree structure; and constructing a total indicator evaluation model by a method of breadth first search of multi-tree to complete the comprehensive evaluation of military training level.