Line generator laser gets a bit complex structure than laser pointer. It is providing users a clearly visible and bright laser line, instructing users to make clear and noncontact laser line positioning on all raw material surfaces efficiently. This laser line module is very compactly designed with aircraft used aluminum alloy housing material, which can be easily installed easily on any vertical or horizontal surface of any mechanical devices. The application of line generator laser in industrial inspection and mechanical processing can greatly improve work can reduce extremely labor force input and improve working efficiency.