The present disclosure relates to the field of tablet computer accessories, and in particular, to a protective case with an electronic function. The protective case with an electronic function according to the present disclosure provides a tablet with more extension functions, which can not only protect a tablet computer but also add functions to the tablet computer. Moreover, the protective case is further electrically connected to a corresponding external keyboard by magnetic adsorption, which is convenient to use and changes the tablet into a portable mini-laptop, which is especially suitable for mobile officing.