Abstract: According to the structural characteristics of helicopter blade heating components, a reliability test system for rotor blade heating components was designed and constructed, and the reliability of the heating circuit and welded structure of heating components in vibration and hot load environment was studied. During the test, the composite plate bonded to the heating component reached the first-order resonance frequency, driving the heating component test piece to deform together. At the same time, the heating component was heated according to the control rate during the test. The test system successfully assessed the reliability of the heating circuit and welded structure of the heating component, and pointed out the weak position of the reliability of the heating component circuit. The test shows that the test system is reliable and stable, and the reliability assessment of the heating component is realized. Also, the welding structure of the heating component has high reliability, but the heating circuit close to the welding point has low reliability and fracture. Additionally, the test results provide the direction for the structure improvement of the paddle heating component.