The present invention discloses a test and analysis method of geotechnical media tension-shear strength, and relates to geotechnical media tension-shear technology. The structure of the device is as below: a specimen (1) is installed in a holder (2); an axial pressure system (3) is connected to the specimen (1), and used for loading and recording axial pressure; an internal pressure system (4) is connected to the specimen (1), and used for loading and recording internal pressure and a tension-shear point capture device (5) is connected to the specimen (1) to achieve capture of the tension-shear point. The main steps of the method are as below: using a thick-walled cylinder-type crack instrument to achieve a geotechnical tension-shear failure test; calculating tension-shear strength; and drawing a tension-shear curve. The present invention has the advantages of simple experiment operation, high degree of automation and good repeatability. The method can be applied almost without modification to rock media compression shear strength test, and expands the scope of application of a traditional thick-walled tube fracturing experiment technology.