The invention discloses a bonedry solid coupled calcaneus ultrasonic bone strength index testing method. In the method, a bonedry and all-solid coupler is adopted, a constant-temperature hot air heating unit performs constant-temperature control in a measurement process; a clamping force test unit and a width test unit test the clamping force and width; and thus, the measurement conditions are consistent at each time, the measurement error is minimized, and the bone strength index can be reflected accurately.