A switching circuit includes: a main switch array including multiple main switch elements respectively arranged on multiple main signal paths configured in a parallel connection, wherein the multiple main signal paths are coupled with a first circuit node; a main switch control circuit for controlling the multiple main switch elements; an auxiliary switch array including multiple auxiliary switch elements respectively arranged on multiple auxiliary signal paths configured in a parallel connection, wherein the multiple auxiliary signal paths are also coupled with the first circuit node; and an auxiliary switch control circuit for controlling the multiple auxiliary switch elements so as to maintain a total number of turned-on switch elements in the main switch array and the auxiliary switch array to be equal to or more than a threshold quantity.