The invention discloses a strain diagram identification method based on ultrasonic transient elastography. The strain diagram identification method can be applied to identifying strain diagrams of body membranes, liver tissues and non-liver tissues. On the basis of the ultrasonic transient elastography and diagram processing, the obtained strain diagrams are analyzed through a series of algorithms, and the strain diagrams of the different tissues are identified and judged according to an algorithm processing result. The method includes the first method of diagram identification based on a strain diagram grey value, the second diagram identification method based on a strain diagram grey value turning rate and the third strain diagram identification method of filtering out border lines. Thecalculation result is subjected to statistic analysis, an optimal threshold value is selected to serve as the mark for the diagram identification, and the identification precision is improved.