The result of the conventional tunneling safety evaluation system may be incomprehensive, not in time and may be influenced by subjective factors. In the paper, the causes for the accidents during the construction of highway tunnels are analyzed on basis of the data measured by the multiinformation warning system; a new tunneling safety evaluation method is proposed on basis of the mechanism of the multiinformation warning system and the application of the warning system in the construction of Toudaoxue tunnel. Due to the automatic data acquisition and monitoring function of the multiinformation warning system, the complex risk factors can be converted into definite safety evaluation results by means of the tunneling safety evaluation method established, the specific risk sources can be determined and the tunneling safety can be guaranteed as far as possible.