Abstract: A solar anti-shadowing circuit coupled to multiple solar cell units connected in series. The circuit includes a metal oxide semiconductor (MOS) switching group. The switching group includes multiple MOS switches, and each of switches is connected to the corresponding solar cell unit in parallel. The circuit also includes a driving unit group, and the driving unit group includes multiple driving units. Each of the multiple driving units respectively outputs a control signal to the corresponding switch. When a shadowing event happen, the driving unit outputs the control signal to the corresponding MOS switch so as to electrically connect the MOS switch.