A time correction device for a PET system, comprising a detector ring (10), a ring-shaped phantom (20), a detection module (30), a data collection module (100), a data matching module (200), a time shift calculation module (300), and a data correction application module (400). The center of the ring-shaped phantom (20) overlaps with the axial and radial center of the detector ring (10). The detection module (30) is located in the ring-shaped phantom (20). The center of the detection module (10) is located at the center of the ring-shaped phantom (20). The data collection module (100) comprises a data gathering module (110) and an energy filtering module (120) connected to each other. The data gathering module (110) comprises a detector (11) and the detection module (30). The energy filtering module (120) is connected to the data gathering module (110), and receives single-event time data sent from the data gathering module (110). The data matching module (200) is connected to the energy filtering module (120), and receives the single-event time data. The time shift calculation module (300) is connected to the data matching module (200) so as to provide a shift value of the detector (11). The data correction application module (400) is used to apply the shift value to the entire system. The device reduces the complexity of a time correction algorithm of a PET system, is easy to operate, and reduces the operational cost of the PET system.L'invention concerne un dispositif de correction temporelle pour un système de TEP, comprenant un anneau de détecteur (10), un fantôme en forme d'anneau (20), un module de détection (30), un module de collecte de données (100), un module de mise en correspondance de données (200), un module de calcul de décalage temporel (300), et un module d'application de correction de données (400). Le centre du fantôme en forme d'anneau (20) chevauche le centre axial et radial de l'anneau de détecteur (10). Le module de détection (30) est situé da
