The hand-held laser head of the 300W mini laser cleaning machine has a simple appearance, is small and light, and can be used by hand for a long time. The integrated design of the button and the handle is easy to use. The built-in scanning system adopts a small high-speed motor and drive, and the main body is integrally processed, which is strong, dustproof, stable and durable. The laser head adopts an innovative red light-assisted focusing design, which can easily find the focusing position under different field lenses by using the red light indicator.