Safety screw with anti-disassembly structure

The utility model discloses a safety screw with an anti-disassembly structure, and relates to the technical field of auxiliary devices for connection and fastening, a lower connecting drill column and a round fixing upper block are arranged on the upper side and the lower side of a screw cylinder, and the lower connecting drill column, the round fixing upper block and the screw cylinder are of an integrated structure; an inner reserved circular groove is formed in the middle position of the upper end of the interior of the circular fixing upper block, and a built-in circular block is arranged in the middle position of the interior of the inner reserved circular groove; the limiting inner transverse columns are arranged on the two sides of the lower portion of the built-in circular block, the limiting inner transverse columns are fixedly connected with the built-in circular block through connecting springs, transverse column limiting grooves are formed in the two ends of the lower portion of the interior of th