The invention relates to a power supply switching device. The power supply switching device comprises a shell and a pressing assembly, wherein an upward opening can be formed in the shell; the pressing assembly comprises a sliding rod, the lower end of the sliding rod is connected with a second contact rod, two second contacts are arranged at the lower end of the second contact rod, two fourth contacts are arranged at the upper end of the second contact rod, a pressing piece is fixed at the upper end of the sliding rod, the sliding rod passes through an opening of the shell, the lower end of the sliding rod is positioned inside the shell, the upper end of the sliding rod is arranged outside the shell, a spring is further arranged on the sliding rod, the upper end of the spring acts on the pressing piece, and the lower end of the spring acts on the shell. According to the power supply switching device disclosed by the invention, a power supply can be switched under the effect of external force, and an original state can also be recovered after the external force is repealed, so that the device is convenient to operate.