The utility model provides a spacer installation device, and relates to the technical field of power transmission line installation tools. The spacer installation device comprises an operation part, ascrew rod, a blocking part, a connecting piece and a clamping component. Wherein the operating part is connected with one end of the screw rod, the blocking part is connected with the other end of the screw rod, the connecting piece is sleeved on the screw rod and is in threaded connection with the screw rod, one end of the clamping component is fixedly connected with the connecting piece, and the other end of the clamping component and the other end of the blocking part form a clamping part, so that the screw rod moves under the action of the operating part; And a rotationally connected blocking piece is arranged in the blocking part so as to limit the movement of the spacing rod. The technical problem that in the prior art, an existing spacer installation device cannot clamp spacers ofdifferent types is solved. According to the utility model, the clamping component and the blocking part can realize clamping of spacers of different types.