主要的树皮药材有杜仲皮、黄柏皮、厚朴皮与肉桂皮等 ,可以按照下列方法采收加工。1　采收方法1.1　砍树采皮法即把需要间伐或主伐的树先行砍倒 ,再按一定的长度分节剥下枝皮和树干皮即可。1.2　活立树采皮法( 1)环割采皮先分别在树基部离地 2 0ｃｍ处和树干 12 0ｃｍ处各环割 The main bark herbs are Eucommia bark, cork bark, honeysuckle leather and cinnamon bark, etc., can be harvested and processed according to the following methods. 1 Harvesting Method 1.1 Cutting Tree Tying Method That is, the need for thinning or cutting the tree first cut down, and then cut the branches and trunk bark a certain length of section can be. 1.2 live tree mining method (1) cut and cut the skin were first at the base of the tree 20cm away from the ground and the trunk of the ring cutting at 120cm