While we were analyzing the proposed theory about the crystal growth,we doubted that the interface phase existed in the process of crystal growth.With this,we had looked for a lot of references connected and analyzed them.We find that the interface phase does exist in the process of crystal growth and takes a critic role.Therefore,we divide the interface phase into three co relative parts:interface layer,adsorptive layer and transitive layer.Base on the above ideal,we demonstrate the role of interface layer,adsorptive layer and transitive layer in the process of crystal growth respectively.Furthermore,we proposal the interface phase model about the crystal growth.