The present invention provides a distribution network medium-voltage load seamless switching device based on solid-state switches. The device comprises a working power supply, a first sensor, a firstsolid-state switch, a standby power, a second sensor, a second solid-state switch, an intelligent microprocessor control system, a third sensor and an electric device. In a normal state, the second solid-state switch is in a disconnection state, when the intelligent microprocessor control system detects that the working power supply has faults, the intelligent microprocessor control system sends acontrol instruction to the first solid-state switch and the second solid-state switch to disconnect the first solid-state switch and connect the second solid-state switch, and the first solid-state switch and the second solid-state switch perform feedback of state information to the intelligent microprocessor control system. The distribution network medium-voltage load seamless switching device based on solid-state switches employs a fully-controlled power electronic device to effectively improve a switching speed of automatically switching switches and achieve load seamless switching, an arcis not generated in the switching process, and the life and the reliability are greatly improved.