Provided are a terminal device and a camera assembly thereof. The camera assembly comprises a fixing support, a camera module, a driving mechanism and an operating mechanism, wherein the camera module is connected to the fixing support in a rotatable manner, the driving mechanism is provided between the camera module and the fixing support and is used for producing a rotation driving force for the camera module relative to the fixing support so as to drive the camera module to rotate, with a side of the camera module as the axis, in such a manner that the opposite side of the camera module rotates away from the fixing support; and the operating mechanism is fixed on the fixing support and is used for limiting a reset state position of the camera module.