Cold-drawn precise seamless steel tube

The utility model discloses a cold-drawn precise seamless steel pipe which comprises a connecting pipe, steel pipe bodies are arranged on the two sides of the connecting pipe, and the connecting pipe is connected with the steel pipe bodies through connecting mechanisms. The connecting pipe is simple in structure and reasonable in design, firstly, the clamping sleeve and the nut are arranged on the outer side of the steel pipe body in a sleeved mode, then the pipe opening of the steel pipe body is aligned with one side of the connecting pipe, and then the nut starts to be screwed to enable the clamping sleeve and the nut to move towards one side of the connecting pipe till the clamping sleeve tightly holds the steel pipe body. Meanwhile, a push block on one side of the clamping sleeve pushes a sliding block to slide in a groove, the shape of the sliding block is matched with the section of a pressing ring, the pressing ring is pushed to tightly hold the steel pipe body, and the clamping sleeve, a nut and an ex