Abstract: The working principle and force analysis of the buckstay corner components for supercritical boiler were mainly introduced, including the design of buckstay corner components for vertical water wall tube and spiral water wall tube, and the requirements for field installation of corner components were described. Results show that, the design of corner components should pay attention to the size and quantity of parts, the length of weld and the height of welding foot, and the size match of pin and pin hole. During the installation of corner components, welding should be performed according to the drawings to avoid missing welding.