The invention discloses a manual switch detection system for an aluminum cell controller. A cell controller manual switch signal collection module collects the working signal of a manual switch periodically; a cell controller hand-operated switch signal detection module is connected with the cell controller hand-operated switch signal collection module so as to judge the collected hand-operated switch working signals of whether need or not to send an alarm; a trouble alarm module is connected with the cell controller manual switch signal collection module, when finding a useless signal, the cell controller manual switch signal collection module transfer the useless signal to the trouble alarm module to carry out alarm prompt. The invention periodically detects and analyses the state of the manual switch of the cell controller, which facilitates controlling and monitoring production. When the manual state runs out of the theoretical duration, the speech alarm prompt is also carried outto inform an electrolysis manager to timely resume the automatic control state, thereby avoiding paroxysmal effect caused by the long feeding stop time and avoiding safety misadventure caused by malfunction due to the error of the manual switch.