The invention discloses a mobile phone charger applied to an electric vehicle. The mobile phone charger comprises a shell body and an adapter group extending from the front surface of the shell body. A power conversion device is disposed in the shell body, and the rear surface of the shell body is provided with a port connected with a power supply of the electric vehicle or a motorcycle, the left surface of the shell body is provided with an audio connection line, sound amplification holes are formed in the right surface of the shell body, the lower side of the upper surface of the shell body is provided with a knob used for adjusting sound volume, the upper side of the knob is provided with a mobile phone fixing groove, the mobile phone fixing groove comprises a groove body, a movable upper clamping plate arranged at the top end of the groove body, and a fixed lower clamping plate arranged at the bottom plate of the groove body, and a fixed hanging groove is formed in the back surface of the shell body. Compared with the existing technical schemes, the mobile phone charger disclosed by the invention has good fixing property and wide applicability, brings more convenience for the daily life of people.