Professional shaking head computer lights can be divided into 250W, 575W, 1200W and other varieties. Among them, 1200W is the main type of lamp for professional performance venues. This paper focuses on the analysis of the construction principle of the 1200W moving head light. In a nutshell, the head light is composed of three major systems: optical, mechanical, electrical and program control. The three systems are interconnected and organically combined to meet the needs of light, color, speed, direction, effect, heat dissipation, noise, and positioning.