The invention relates to a three-position switch operating handle limiting device and a three-position switch interlocking device. The device comprises a side plate and a limiting plane connecting rodmechanism, wherein the limiting plane connecting rod mechanism comprises a fixed hinge point which is fixed relative to the side plate and a movable hinge point, two connecting rods are bridged between the fixed hinge point and the movable hinge point, the space for a three-position switch operating handle to pass through is formed between the fixed hinge point and the movable hinge point, a circumferential stop piece is assembled on the side plate in a swinging manner, a movable end and the movable hinge point synchronously move to be in stop fit with a circumferential stop part on the three-position switch operating handle, an axial limiting structure matched with an axial limiting part of the three-position switch operating handle in a limiting mode is further included, the movable hinge point is far away from or close to the fixed hinge point, and alternate working of the axial limiting position and the circumferential stopping position is achieved. The device is advantaged in that a circumferential stop piece is assembled on the side plate in a swinging mode, and that the circumferential stop piece and the axial limiting structure can stably achieve stopping and limiting is guaranteed.