Insertion slot cover and electronic device

The utility model provides an insertion slot cover and an electronic device. The insertion slot cover is applied to an electronic device. The electronic device comprises a body and a mainframe board. The mainframe board is arranged in the body. The body comprises an insertion slot. The insertion slot cover can be used to load a number of external cards, and is placed in the insertion slot. The insertion slot cover comprises a cover body, a circuit board and a number of fixation pieces. The circuit board is connected with the cover body. The circuit board comprises a number of electrical connection components and a transmission contact group. A number of electrical connection components are respectively arranged on a first face and a second face of the circuit board. Each electrical connection component is electrically connected with the transmission contact group, and is used for being electrically connected with each external card when each external card is placed on the first face or the second face. The tr