The invention discloses a limiting device for a positioning rod of a date wheel or a week wheel in a watch, which is characterized in that a fixing column and a limiting column of the positioning rod of the date wheel or the week wheel are arranged on a bottom plate of a watch movement, one end of the positioning rod is hinged with the fixing column of the bottom plate, and the other end is provided with a protrusion, one side surface of the positioning rod is elastically connected with an elastic plate, and the other side surface leans against the limiting column. When the other side surfaceof the positioning rod leans against the limiting column, the protrusion of the positioning rod is matched with gear slots of the date wheel plate or the week wheel plate. By adopting the structure and utilizing the limiting column on the bottom plate of the watch movement, the matching degree between the protrusion of the positioning rod and the gear slots of the date wheel plate or the week wheel plate is controlled, the over-tightening butting between the protrusion of the positioning rod and the date wheel or the week wheel is avoided, and the timing function of the watch and accurate display of date and week are ensured.