Collagen and chitosan were mixed in various ratios to made collagen-chitosan blended spinning solutions.The above solutions were dried into membranes under certain conditions.And FT-IR,DSC,transparent rate and animal experiment etc.were employed here to test the properties of the membranes.By contrasting these dry membranes in physical compatibility,inter-reaction and biologic compatibility,we discovered the optimal system whose proportion is collagen∶chitosan=20∶80.