Abstract: To know how to use the ultrasonic method on to evaluate the bonding strength of titanium steel clad plate grade assessment is of significance to the application of titanium steel clad plate. In this article, ultrasonic testing was adopted to test the ratio of a bottom wave to the echo to the titanium steel interface, and the relationship between shear strength and the ratio were investigated. The corrugation and microstructure at the interface were analyzed. A type ultrasonic testing method was applied to the grading evaluation of titanium steel clad plate. Through experimental analysis, 20lg (B₁/S) value was more than 9, the shear strength explosive welded titanium steel clad plate was above 180 MPa.