The creation of 405nm violet laser line generator gathers qualified 405nm violet laser diode, glass coated lens and electric driving circuit board. It gets high attention to design of its thermal stabilization. According to different dimension design of anodized aluminum alloy housing tube and inner configured metal heat sink cooling system; it always gets superior thermal emitting and thermal conductivity. The usual laser beam stability reaches as high as 85% under constant daily operating time of 8 to 10 hours.