This is a multi-center phase III randomized controlled study, designing to access whether the efficacy of EGFR-TKI alone on patients with brain metastasis from non-small cell lung cancer (NSCLC) harboring EGFR mutant type is not inferior to EGFR-TKI concurrent with whole brain radiotherapy (WBRT), the primary end point is intracranial PFS (iPFS), while secondary outcomes included overall survival (OS), objective response rate (ORR), evaluation of cognitive function, quality of life (QoL) and adverse events.