The invention discloses an insulator ball connecting device capable of achieving fast connection. The insulator ball connecting device comprises a clamping member, a buckling member, and a connecting member. The clamping member comprises a clamping member base plate, a through hole, a groove, and the connecting member. The buckling member comprises a buckling block and a stopping block. The top of the connecting member is connected with a first connecting rod and the first connecting rod passes through the top of the connecting member. The bottom of the first connecting rod is fixedly connected with a reinforcing connector. The bottom of the connecting member is fixedly connected with the clamping member base plate. The through hole and the groove are arranged on the center of the clamping member base plate in a staggered manner. The buckling block is arranged on the top of the buckling member. The bottom of the buckling block is fixedly connected with the stopping block. The bottom of the stopping block is fixedly connected with a second connecting rod. The insulator ball connecting device is capable of fast connecting an insulator ball, firm and durable, and worth popularizing in a large range.