Abstract: The surface of cylinder bore is treated by the laser honing to form linearly extending lubricant channels and grooves with the predetermined width,depth,angle,shape and gap,which can be well matched to the needs of lubrication.It results in not only remarkably improved property of wear resistance of cylinder and its life span,but also largely decreased HC ejection from the internal combustion engine,the consumption of fuel oil and lubricant,the pollution of catalytic apparatus and the cost of piston.