In allusion to the safe risk of brake’s temperature rise of towed gun’s brake caused by continuous braking in the marching, designs a monitoring and alarm system for temperature rise of towed gun’s brake based on infrared sensor, utilizing the technology of infrared temperature measurement, microcontroller and wireless transmission. Analyze the overall design of the system, hardware design, software design and carry out temperature compensation tests. The result shows the system which has high precision and simple operation can correctly monitor real-time temperature situation of the brake. It greatly improves the equipment life, reduces the security risk in the marching, and has a strong practicability, provides the new method for monitoring and eliminating the risk of braking safety due to rising temperature.