The application provides a combined ultrasonic probe capable of adjusting a coupling force. The combined ultrasonic probe comprises a casing (1), an adjusting bolt, spring guide sleeves (3), a top cover (4), a probe (5) and a spring (6). According to the combined ultrasonic probe capable of adjusting the coupling force, provided by the invention, the spring is arranged inside a probe component; the spring guide sleeves and the adjusting bolt are arranged behind the spring; a pretightening force of the spring is adjusted according to a specific position of the probe on the pedal surface during detection, so that the probes with different compression strokes have the same pressing force by adjusting, and the probes at all parts have same coupling conditions.