The fluorescent one-time bioclean vaginal dilator improves the diagnostic criteria of cervical disease mainly by creating appropriate luminous environment. Illumination source uses independent modular design skillfully and is plug-in installed in vaginal dilator‘s handle. In the process of clinical use, it keeps clear of human bodies, avoiding vaginal discharge and other bodily fluid effecting electric circuit and cross-infection caused by re-use. It can reduce dispense by degassing. BiLED light source transmit light ray from handle to front-end by curving light guide, so there is no reflection ray causing veiling glare to doctor.