The present disclosure provides an imaging module, a camera assembly and an electronic device. The imaging module includes a housing, including a light inlet; a reflective element, a mounting base, and an image sensor arranged in the housing; the reflective element being configured to redirect incident light from the light inlet to the image sensor, and the image sensor sensing the incident light outside the imaging module; the reflective element arranged on the mounting base; the mounting base being arranged with a limiting structure connected to the reflective element and configured to limit a position of the reflective element on the mounting base.