Abstract: The subject invention relates to a rotating spindle mechanism comprising a first fixed plate, a second fixed plate, a first washer, a second washer, a screw and a sleeve; said screw penetrating the first washer, the spindle hole on the second fixed plate and the second washer, then tightened into the inside thread of the sleeve, while the other end of the screw being riveted to the sleeve, the spindle part of the screw being enclosed by the first washer, the spindle hole on the second fixed plate and the second washer, the rivet blocks of the sleeve being riveted onto the rivet hole on the first fixed plate, to comprise the rotating spindle mechanism; With said construction, it will achieve such advantages and effects as better tightness, easier adjustment, free from oil stains, higher rate of satisfactory parts, extended service life of rotating spindle, secure fixation without loosening, reduced cubic measurements, better employment of space, reduced production costs, better configuration without deformatio