Provided are a respiratory guiding device (100) and method used in respiratory gating ion beam irradiation, the respiratory guiding device (100) comprising: a respiratory signal detecting unit (101), for measuring a respiratory motion trajectory curve during free breathing and deep breathing, and a real-time respiratory motion position signal in the case of guided respiration a respiratory signal processing unit (102), for modeling free breathing and deep breathing according to an average respiratory cycle and an average respiratory amplitude calculated on the basis of the respiratory motion trajectory curve and setting a preset breath-hold time at the tail end of a function curve of a free breathing model and a deep breathing model to establish a respiratory guiding curve a control unit (103), for adjusting the magnetic excitation cycle of a synchrotron according to the respiratory cycle represented by the respiratory guiding curve during free breathing or deep breathing, thus synchronizing the magnetic excitation cycle of the synchrotron with the respiratory cycle. The device and method effectively reduce residual motion in a target region within a guided respiration window, and improve irradiation efficiency and precision of an ion beam.La présente invention concerne un dispositif de guidage respiratoire (100) et un procédé utilisé dans lirradiation de faisceau dions à synchronisation respiratoire, le dispositif de guidage respiratoire (100) comprenant : une unité de détection de signal respiratoire (101), pour mesurer une courbe de trajectoire de mouvement respiratoire pendant une respiration libre et une respiration profonde, et un signal de position de mouvement respiratoire en temps réel dans le cas dune respiration guidée une unité de traitement de signal respiratoire (102), pour modéliser la respiration libre et la respiration profonde conformément à un cycle respiratoire moyen et une amplitude respiratoire moyenne calculée sur la base de la courbe de traj
