The utility model discloses an instrument for transmitting composite insulator, including the connecting rod, the connecting rod top is connected with annular piece, a connecting rod bottom and a semicircular clamp ring lateral part rigid coupling, a semicircular clamp ring's one end is passed through swivel connected coupler and is connected with the 2nd semicircular clamp ring's one end, a semicircular clamp ring's the other end is connected with the 2nd semicircular clamp ring's other end looks block. Need not to utilize rope ligature insulator, connect through a semicircular clamp ring and the 2nd semicircular clamp ring's block, just can realize fixing the insulator, accomplish the back in the transmission, the buckle junction of directly opening two semicircular clamp ring just can be taken out the insulator, and convenient operation is swift, has solved the shortcoming when insulator in the past transmits. Block the insulator through two semicircular clamp ring, simultaneously with the card end insert insulator bowl head in, fixed insulator that can be reliable prevents that the insulator from deviating from.