Objective To explore the plasticity of language cortex and language-related white matter fibers in patients with cerebral arteriovenous malformations in Broca region. Methods A total of 5 patients with cerebral arteriovenous malformations in Broca region （B-BAVM） who underwent microsurgical resection in Beijing Tiantan Hospital from September 2016 to May 2019 were prospectively selected as the study subjects. Blood oxygen level-dependent functional MRI （BOLD-fMRI） and diffusion tensor imaging （DTI） were performed within 1 week before and 6 months after microsurgery. The fiber bundle of the language-related white matter functional area and its homologous fiber profile on the opposite side were evaluated. The laterality index （LI） between the lesion and the activated voxels of the language cortex in the opposite hemisphere was calculated. Results Six months after operation， the number of arcuate fibers in the left hemisphere of the 5 patients was 67 （20，217）， lower than 781 （285，1 191） before operation； The number of fibers in the left hemisphere hook bundle after operation was 386 （190，852）， higher than 220 （114，422） before operation， and the differences were statistically significant （P＜ 0.05）. There was no statistically significant difference in the number of fibers in the anterior segment， posterior segment， inferior longitudinal segment and inferior fronto-occipital segment of the arcuate tract between the two hemispheres of 5 patients before and 6 months after operation （P＞ 0.05）. The preoperative LI of Broca area was 1.000 （0.753，1.000）， higher than the postoperative LI of 0.070 （-0.890， 0.537）， and the difference was statistically significant （Z=-0.023， P ＜ 0.05）. Conclusions After surgical resection of cerebral arteriovenous malformations in the Broca region， the contralateral homologous region and the ipsilateral hemispheric hook bundle in the Broca region of the patient's brain participated in compensation， providing evidence for the functional reorganization of the Broca region after injury.