Cross line laser module makes the best use of superior laser advantages of good direction and high brightness, always generating high accuracy 90 degrees two perpendicular lines on all desired working surfaces. This cross line alignment tool is easy to operate and install, providing users high stability and direct cross line positioning on desired working surfaces. When users are making accurate cross line positioning with this advanced crosshair laser module, it can greatly improve working efficiency, reduce manual and production cost, thus greatly improve work efficiency seriously.