The utility model relates to parallel bars with high use safety and convenient height adjustment, a supporting rod is used for supporting a transverse bar, the supporting rod comprises a supporting rod and a supporting
pipe, the supporting rod is inserted into the supporting
pipe and is in linear sliding connection with the supporting
pipe, a plurality of vertically arranged height adjusting
insertion holes are formed in the supporting rod, a through hole is formed in the supporting pipe, and the height adjusting
insertion holes are communicated with the through hole. The via hole is selectively coaxial with one of the height adjusting jacks; each supporting rod is provided with an
insertion unit, the radial movement of the
acute angle turning on the
leaf spring relative to the guide cylinder is controlled through the
control rod, and the compression and resetting of the compression spring are matched, so that the insertion part is kept in a retraction state or an extension state, and then the insertion with or separation from the coaxial via hole and the height adjusting insertion hole is realized, and the height of the parallel bars is conveniently adjusted. According to the technical scheme, the
structural reliability is high, the
operation safety coefficient is high, and the
structural integrity is easily kept in the using process.