Abstract: Using the means of similar analysis,this paper derives such similar standard and ratio as geometric similar,time similar,dynamic similar,movement similar,and material similar with geological structure physical model,discusses the experimental model,means,materials and the boundary condition of geological structure physical modeling experiment,points out that they might simulate various complexgeological structure patterns with different materials under the definitive boundary condition.The author thinks that the geometric similar,dynamic similar,material similar and boundary similar are primary similar condition reflecting essential properties of the geological structure,but the time similar and movement similar are secondary similar condition reflecting its appearance properties.It is difficult to demand the geological structure patterns physical model to whole satisfy the similar condition,because geometric dimension of geological structure is immense,its elapsed time is too long and its structure deformation is considerably complex;therefore,the people are not satisfied with the results of geological structure physical modeling experiment yet.