Carbon fiber reinforced plastics has been widely used in the aircraft industry and automobile industry owing，to its superior properties. In this paper, a picosecond pulsed system emitting at 355nm has been used for carbon fiber，reinforced plastics milling experiments to determine optimum milling conditions. The influence on milling quality and milling，depth of milling parameters including laser power, milling speed and hatch distance were analyzed. Microstructure and milling quality were discussed through the machined surface observed with scanning electron microscope. It was found that，hatch distance has a great influence on heat affected zones. A removal technique based on the experiment with different focal，planes was proposed and the depths were measured with the three dimensional profilometer. The relationship between laser energy and milling depths was analyzed and the optimal focal scheme was determined.