Abstract: As an important layout structure for modern urban pipelines， the utility tunnel can not only effectively reduce the difficulty of pipeline operation and maintenance， but also improve the service life and disaster resistance. In order to ensure the destruction-resistance capacity of the city's underground utility tunnel and maintain the normal operation， a new type of air-tight escape door for the utility tunnel has been proposed， which provides protection for the important entrance positions of the utility tunnel. At the same time， numerical simulation methods were used to analyze the displacement， stress， and deformation parameters of the escape door under the impact waves of chemical and nuclear loads. The results indicated that the escape door met the protection requirements， and there was a significant rebound effect under the action of chemical weapons loads. Meanwhile， the maximum rebound displacement mainly depended on the negative pressure in the explosion load. At last， the locking shaft and hinges were the main restraining components of the escape door， which were subjected to complex and concentrated stresses under factors such as shock waves and rebound effects. Therefore， necessary optimization design should be adopted.