Abstract: The advanced 3D non-contact measurement system of rock mass-ShapeMetriX3D is used to take，photography and measurement on rock structural plane of a high and steep slope in open-pit mine.Photograph on the specified regions from different angles are taken to synthesize a 3D model using the two angle photos of the same position of slope.Then the 3D model is employed to identify and explain the structure of rock and fracture of the generated 3D model using the JMX Analyst module，and simultaneously group the structural plane，obtaining detailed data of geometrical information for all structural plane.By thie method，the high risk and difficulty of Manual collection Rock mass structure surface of high and steep slope can be effectively solved，thus providing the real and reliable data for studying the stability of high and steep slope.

Key words: High and steep slope, Rock mass structural plane, 3D non-contact measurement, Digital identification