Abstract: Aiming at the current problems in the internal state monitoring of cable tunnels, this paper proposes a comprehensive wireless monitoring system for cable tunnels based on wireless ad hoc networks. Utilizing the characteristics of self-organization and self-healing of mesh self-organizing network, combined with MEMS sensor chip, developed wireless temperature and humidity sensors, O₂, CO₂, CO, CH₄ and other wireless gas sensors, and developed monitoring system software. The influence of the structure of the cable tunnel on wireless communication is analyzed, and a wireless sensor installation plan suitable for the inside of the cable tunnel is proposed, and field applications are carried out to provide a basis for the subsequent research on the comprehensive wireless monitoring of the cable tunnel.