The invention provides a rotating shaft and an electronic device. The rotating shaft is used for connecting two screen supports. The rotating shaft comprises two shaft core structures, the two shaft core structures are symmetrically arranged, and each shaft core structure comprises a shaft core, a motion conversion structure, a screen support connecting structure and a supporting support. A worm groove is formed in the surface of the shaft core. The motion conversion structure is matched with the worm groove to form worm transmission. The screen bracket connecting structure is movably connected with the motion conversion structure and comprises a mounting hole for mounting the screen bracket. The motion conversion structure can move on a first plane relative to the supporting bracket in the axis direction of the shaft core, and the screen bracket connecting structure can move on the first plane relative to the supporting bracket in the radial direction of the shaft core. The first plane is a plane where the supporting bracket is located.