The utility model relates to a deflection coil, which is used for a color cathode-ray pipe, and is composed of a conic part and a support frame part for a pipe neck, wherein, the support frame part for a pipe neck is arranged on the outer circumferential surface of a CRT pipe neck; the conic part can rotate relative to the support frame part of a pipe neck; the support frame part for a pipe neck can be dismounted from the conic part; meanwhile, on the support frame part for a pipe neck, an elastic bridge-shaped piece is equidistantly arranged on the outer circumferential surface of a pipe-shaped plug; a plurality of pawls extend out from the elastic bridge-shaped piece. In addition, tooth are equidistantly arranged on the inner circumferential surface of the socket of the conic part. The tooth can accommodate the pipe-shaped plug, and meanwhile, are engaged with the pawls.