The invention relates to a stent delivery system integrating optical and ultrasonic image diagnosis and treatment functions. The stent delivery system is provided with a three-way connection, and the three-way connection is respectively connected with a connection end, a balloon tube and a protective tube. The connection end connects the device. The inside of the balloon tube is a protective tube, the proximal end of the balloon tube is connected to the propeller, the outside of the balloon is provided with a stent, the front end of the stent delivery system is provided with a probe, the protective tube at the front end of the probe is provided with a developing ring, and the front end of the protective tube is provided with a guide wire hole . The connector of the connection end is in the form of an integrated connector combining an electrical ferrule and an optical ferrule. The electrical ferrule and the optical ferrule are fixed inside the connector sheath. The probe integrates an acoustic probe and an optical probe, and both the acoustic probe and the optical probe are fixed on the shell. The system of the present invention has both diagnosis and treatment functions, can optimize and guide PCI treatment decision-making, and complete surgery at the same time, shorten operation time, improve operation success rate, and relieve patients' pain.