Between March, 2017 and August, 2018, 48 patients were enrolled. 43 patients were locally detected ALK positive by FISH or IHC (VANTANA), 5 patients harbored with ROS1 fusion....In ALK positive patients, the ORR and DCR were 80.5% (33/41) and 87.8% (36/41). The ORRs and DCRs at ≥225mg were 68.6% (24/35) and 85.7% (30/35), respectively....Ensartinib was well tolerated in Chinese ALK-positive NSCLC patients with high antitumor activity.