Whenever line aligning work is processing at quite long work distance, it is not easy to reach with formal line drawing or line printing work. Until the time laser tech engineers makes constant technical innovation of 445nm blue laser diode tech, equipping with qualified separate crystal lens, it is being made into a quite practically used device of 445nm blue line laser module. It is generating non Gaussian distribution blue laser light and highly fine blue line from beam aperture. Only if it makes proper installation and adjustment of beam focus, this laser line generator assures the most concentrated blue laser light, and highly fine blue line alignment at long distance. This blue line laser module is employing an import 445nm blue laser diode as electric power source. When it is trying to make continuous blue reference line projection from beam aperture, it just makes good use of cooling system. According to the use of a metal heat sink cooling system and highly durable aircraft used aluminum alloy housing tube, this direct diode emission made blue laser is only adopting quite small size tube diameter of 16mm. In various industrial and high tech line measuring work fields, this laser line generator achieves superior nice thermal emitting, which is also able to work with highly stable and increasing accuracy blue line alignment for both long time and long distance use. On condition that 445nm blue line laser module makes the best use of separate crystal lens, whatever kind of working surface it is pointing, it is performing with non Gaussian distribution blue laser beam, and highly uniform blue reference line from beam aperture. Whatever kind of working surface it is pointing, it is keeping work with the same brightness from middle part towards both ends. In occasion that it makes basic measurement and experiment of line length, line fineness and work distance, after correct use of separate crystal lens, this blue laser line generator is able to make highly fine line alignment as long as 25 meters and other high lighting working occasion as well. Whatever kind of working surface it is pointing, 445nm blue line laser module is operating easy as an accessory part. With the assistance of a laser alignment mounting bracket and extending electric wires, it just allows freely installed distance of 3 meters, and easy blue line projection onto any vertical or horizontal surface. At the same time, blue alignment laser allows easy mounting onto other industrial machine or device, after its easy adjustment of line fineness, it makes sure of increasing accuracy line alignment at great distance. At the same time, after high attention to any thermal energy hurt to human eyes and correct wearing of laser safety goggles, it makes safe and free line alignment in all occasions perfectly.