The electric vehicle holder includes a housing; clamping arms are respectively inserted into two sides of the housing; the electric vehicle holder further includes an electric mechanism, a circuit board, and a power supply module; a normally open circuit configured to control the electric mechanism to drive the two clamping arms away from each other is arranged on the circuit board; and a detector is further arranged in the housing. By arranging the electric mechanism and arranging the normally open circuit on the circuit board, when the electric vehicle holder is powered on, the two clamping arms are opened; since the clamping arms do not need to be opened manually, the installation of a tablet electronic device is convenient.