The invention relates to a hydraulic spring operation mechanism and a travel switch component thereof. The travel switch component comprises a mounting frame used for mounting a corresponding monitoring switch, a one-piece cam is rotatably assembled on the mounting frame and used for being driven to rotate by a disc spring of a hydraulic spring operation mechanism through a disc spring, the one-piece cam comprises a plurality of cam pieces used for corresponding to the trigger end of the monitoring switch, the extending direction of a rotating center axis of the one-piece cam is defined to be the horizontal direction, and the cam pieces are distributed at intervals horizontally. The structure of the one-piece cam is adopted, so that when design and machine accuracy of the one-piece cam meet the requirements, only overall assembly accuracy of the one-piece cam is needed to be considered, cumulative assembly error formed by the cam pieces cannot occur, and assembly efficiency can be effectively improved.