A heavy ion synchroaccelerator comprises an annular vacuum pipeline, the annular vacuum pipeline has a plurality of linear ion beam sections and a plurality of curve ion beam sections, the linear ionbeam sections and the curve ion beam sections are alternately arranged, heavy ions are injected from a first linear ion beam section and are led out from another linear ion beam section, each curve ion beam section comprises one first dipole magnet and one second dipole magnet which are connected in series, the heavy ions are moved from the first dipole magnets to the second dipole magnets, vertical correcting magnets and vertical focusing quadrupole magnets are arranged in order between the first dipole magnets and the second dipole magnets, the linear ion beam sections at the downstreams ofthe second dipole magnets are provided with horizontal correcting magnets, hexapole magnets and horizontal correcting quadrupole magnets in order. The heavy ion synchroaccelerator is simple in structure, can save processing cost, facilitate installation and debugging of the device, is easier to achieve high accumulation flow intensity, and can fully utilize transverse acceptability of the synchroaccelerator.