Visual prostate dilation device with rear-mounted inner capsule

The utility model discloses a visual prostate dilation device with a rear-mounted inner capsule, and relates to the field of medical instruments. The dilation catheter comprises a dilation catheter body, a catheter auxiliary sheath and a soft lens inserted into a main body. The dilation catheter body comprises the main body, a guide section, an outer bag, an inner bag, a cleaning flow guide pipe, a first connecting pipe and a second connecting pipe. The inner bag is arranged at the tail of the outer bag and located in the outer bag. A positioning mark is arranged at the tail part of the outer bag on the main body, a miniature lens of a soft lens is arranged at the tail part of the positioning mark through an open hole, and the positioning mark and the position of the external sphincter of the prostate are respectively referred through the miniature lens, so that the positioning of the positions of the outer bag and the inner bag is realized. According to the utility model, secondary scratch of the soft lens w