Accelerator driven quick heat coupling subscritical reactor

This invention discloses a secondary critical reaction stack driven by accelerators including a target zone, a fast energy spectrum region, hot energy spectrum region, a reflection layer region, a shield layer region and a stainless steel shell orderly arranged from the center to outside, especially taking protons accelerated by an accelerator in the target region and the neutrons generated by spalling reaction of the main target nucleus as the neutron source, the fissible material used by the fast energy spectrum region is natural uranium or low enriched uranium, the enrichment of the UO2 used in the hot neutron energy spectrum region is 3-4% and a super-hot neutron region is formed naturally in the fast and hot energy spectrum regions and transmutation LLFP, which does not realize fast-hot couple, transmutation MA, LLFP but also can produce energies.