Urethral dilator

The utility model belongs to the field of medical instruments, and particularly relates to a urethral dilator. The dilator comprises a guide wire, a dilator body, a ventilation hose, an operation assembly and a super-smooth catheter, a first channel is formed in the dilator body along the axis, the super-smooth catheter penetrates through the first channel, the two ends of the super-smooth catheter extend out of the dilator body, an inner hole for the guide wire to pass through is formed in the middle of the super-smooth catheter, and a second channel is formed above the first channel. The ventilation hose is arranged in the second channel in a penetrating mode, an inflation balloon is arranged on the side, extending out of the end of the dilator body, of the ventilation hose, the inflation balloon is fixed to the ultra-smooth catheter, an operation assembly is arranged at the tail of the dilator body, and the dilator body is operated and the guide wire is fixed through the operation assembly. The dilator is