It has been a problem that defense counsel s rights of investigating evidence is hard to be guaranteed in the criminal lawsuit for a long time.Although some rights have already been modified,for example,defense counsels have right to meet criminal suspects and defendants,to access,extract and copy the case documents and materials,and to access evidence or witnesses in the new Lawyer s Law.Meanwhile,new plight appears in judicial practice,which makes the legislative intention not to be achieved.Therefore,how to further enhance the right of investigating evidence has become emergent.