The utility model discloses a ladder head that can lock by oneself and maintenance ladder who adopts this ladder head, the ladder head includes connecting rod, spring, upward branch, coupler body, elastic inhaul, the hole of reeving reach and seal the pole, maintenance ladder includes the maintenance ladder body and sets up the terraced head on the maintenance ladder body. Ladder head and cable that the present case provided are connected and are broken away from conveniently, connection stability is good, can the effectual personal safety of guaranteeing the operation personnel.