Collapse is one of the main geological disasters during tunnel construction. The prediction of tunnel collapse and classification of tunnel collapse risks are very difficult. A tunnel collapse risk grade evaluation model is established based on ideal point method. Twelve typical indexes are selected for tunnel collapse risk grade evaluation and a series of evaluation standards are decided. The modeling results are testified by 2 typical tunnel samples and they coincide with the actual results and the evaluation results of cloud model. The abovementioned tunnel collapse risk grade evaluation method is simple, intuitive and practical.