For a long time,there are some important aspects,which always have been ignored in choosing the material for mending and mounting reference.Therefore,in this paper,several points have been raised about choosing the suitable material.First,do not select the material arbitrarily.Second,try to avoid using Xuan paper.Last,silk fabric is also prohibited.In addition, in view of the structure and properties of relevant material,the mechanism is also discussed. All these points have important significance and value in protection of reference both theoretically and practically.