For all patients, the mPFS was 15.3m(8/14), ORR was 78.6% while DCR was 100%.The iORR was 80% and iDCR was 100%. The mPFS in patients with 19Del (8/14,57.1%) and21L858R (6/14,42.9%) are 15.3 and 15.2m, ORR are 87.5% and 66.7%, respectively...Dacomitinib showed promising intracranial antitumor activity with a manageable safety profile as first-line therapy in EGFR-mutant NSCLC patients with multiple brain metastases.