The invention provides a cam switch and belongs to an elevator door lock switches. The cam switch comprises a fixing seat, a driving part, cams and a movable contact spring board, wherein the driving part is arranged above the fixing seat, is connected with the fixing seat through a riveting shaft and can rotate around the riveting shaft; when a right cam is pressed to a certain position, the right end of the movable contact spring board is electrically connected with a first contact seat in a touch manner, and a control circuit of the cam switch works; when the cam switch resets, a right cam is required to be pressed, the movable contact spring board is separated from the first contact, the control circuit of the cam switch stops working, so that the cam switch is more stable and better avoids elevator safety accidents. The movable contact spring board is made of a reasonably matched aluminum alloy through a six-stage casting process, the electric conductivity and mechanical properties of the movable contact spring board are further improved, particularly the strength of the movable contact spring board is substantially improved, and the service life of the cam switch is prolonged.