As a kind of structure due to the difference of rock's rheological character, there is great meaning to study deformation and rheology of rock by means of fish head boudin. Based on the development of Fish head boundin, the unique shape of boundinage can be classified into the following 5 types, they are A type, B type, C type, D type and E type, respectively. The authors modeled B、C、D type and E type of fish head boundin in physical laboratory, and studied the relationship between the length of fish head and the original thickness of layer, and put forward a new method to resume original thickness of layer by use of fish head boundin. Accordingly, K1、 K2 、K3 and K4 are available, and practically being used in resuming original thickness of deformed stratum.