Controllable expansion balloon catheter

One end, far away from a balloon, of the catheter is provided with a pressurizing interface, the pressurizing interface is connected with a pressure generator, one end, far away from the catheter, of the balloon is provided with a micro lens, an insulating tube is sleeved in the catheter, the insulating tube penetrates through the balloon and extends to the other end of the balloon, and the micro lens is fixed at the tail end of the insulating tube. A transmission wire is arranged on the micro lens and penetrates through the insulation tube, a signal interface is further arranged at one end, close to the inflation interface, of the guide tube, the transmission wire is connected with the signal interface, a display device is connected to the outer side of the signal interface, and the transmission wire transmits image signals shot by the micro lens to the display device. Compared with the prior art, the device has the advantages of being simple in structure and convenient to operate and control. 本实用新型公开了一种可控扩张