The invention discloses a lockout structure, comprising a basal body, a button used for connecting the basal body, a rotating part, a locating part and an elastic part; at least one clamping-holding part and at least one pushing-supporting part are arranged at the button; the locating part and the rotating part can relatively rotate and match; the rotating part comprises a plurality of supporting-holding parts and a plurality of buckling parts; the pushing-supporting part of the button acts on the supporting-holding parts of the rotating part to rotate the rotating part among a plurality of different pre-set positions; the elastic part is arranged between the locating part and the button to provide elasticity; the button is pressed to match the clamping-holding part thereof with the buckling part of the rotating part for lockout and the rotating part is at a first position; the rotating part is rotated to be at a second position adjacent to the first position for opening and the clamping-holding part of the button removes the buckling to the buckling part of the rotating part. During operation, the button is only needed to be pressed, so that the operation is very convenient; meanwhile, functions of lockout and opening of the button can be respectively realized by the same action of pressing the button.