The invention discloses a special spanner for overhead line china bottles. The special spanner comprises a chain transmission mechanism composed of a large chain wheel, a small chain wheel and a chain. The special spanner is characterized in that an upper shell and a lower shell are arranged, a nut hole is formed in one end of the upper shell, and a connecting small shaft platform is arranged at the other end of the upper shell; a large shaft platform coaxial with the nut hole of the upper shell is arranged at one end of the lower shell, and a driving rod hole coaxial with the small shaft platform of the upper shell is formed in the other end of the lower shell; the upper end of a large chain wheel shaft hole is in a plum blossom hole shape, and the lower end of the large chain wheel shaft hole is connected with the large shaft platform; the upper end of a small chain wheel shaft hole is connected with the small shaft platform, and the lower end of the small chain wheel shaft hole is in a square hole shape; the periphery of the upper shell and the periphery of the lower shell are connected through screws; a telescopic insulation sleeve rod perpendicular to the surface of the lower shell is arranged in the middle of the lower shell, and threaded connection is adopted in the sleeve rod. The special spanner has the advantages that the stricture is simple, operation is flexible and convenient, labor is saved during operation, weight is low, and a mounting rod is convenient to carry; meanwhile, by means of an insulation operation rod and the telescopic insulation sleeve rod, operation can be conducted without power cut, and the special spanner can be used without the effect of terrain environments.