The invention discloses a tumor treatment system for optical surgical navigation, comprising a CT machine, an ultrasonic apparatus, an electromagnetic locator, a treatment couch, an optical surgical navigator, gamma radiotherapy equipment, a puncture device, a mechanical arm, a fixed turntable, and a console , the optical surgical navigator adopts a camera vision system, and the RGB camera is used as an image output device to complete image acquisition and output by converting optical signals into electrical signals. It mainly includes three modules: optical imaging part, photoelectric conversion part and electronic circuit part. The optical imaging part includes an optical lens and an imaging plane. When the light projected on the lesion is reflected by the optical lens and refracted by the optical lens, the image of the lesion is projected onto the imaging plane of the RGB camera, and the optical signal is converted into an electrical signal by the photoelectric conversion part, and the electronic circuit Part of the amplified weak electrical signal is uploaded to the console through the USB interface, and the image processing of the console obtains the target position of the lesion.