Electronic arthroscope with adjustable visual angle

A cavity penetrating through the head end and the tail end of a lens core is formed in the head of the lens core, a rotating component is rotationally arranged in the cavity, and a camera module is arranged in the rotating component; a rotating operation part used for controlling the rotating part to be switched between a first position and a second position and any angle position between the first position and the second position is arranged in the handle; at the first position, the optical axis of the camera module is parallel to the axis of the lens core; at the second position, the optical axis of the camera module and the axis of the lens core form a first included angle; within the angle range between the first position and the second position, the cavities are provided with openings, and light sources are further arranged on the wall faces of the two sides of the openings of the cavities. The rotating component which can be controlled to rotate is arranged at the head of the lens core, the camera modul