Therefore, we established Benzo[a]pyrene(B[a]P)-induced bronchial epithelial malignant transformed cells (HBE-P35) to simulate the precancerous lesions of NSCLC and investigated the regulatory axis of YTHDF1 in both HBE-P35 and A549 lung cancer cells. The gene discussed is YTHDF1; the disease is non-small cell lung carcinoma.