Abstract: Soil serves as a primary reservoir for recalcitrant and recalcitrant and toxic organic pollutants, such as benzo a pyrene (Bap). Plant cultivation can modulate the composition and diversity of soil microbial communities, thereby promoting the biodegradation of Bap. However, few studies have investigated the effects of Bap concentration and remediation duration on phytoremediation efficiency, soil microbial community characteristics, and functional potential. Therefore, a pot experiment was conducted using corn to remediate soils with different Bap contamination levels (0.53 and 5.01 mg·kg^-1) over three sampling intervals (7, 35, 63 d). Through GC-MS analysis and 16S rRNA high-throughput sequencing, the degradation dynamics of Bap, shifts in soil bacterial community, and the functional potential succession were systematically analyzed. Results show that corn cultivation achieved substantial removal performance (89.35%-99.24%) in contaminated soils regardless of Bap contamination levels. Compared to Bap concentration (P=0.09), both corn planting and remediation time exerted more significant effects on soil bacterial community structure (P=0.001, P=0.001), with a significant interaction between the two factors (P=0.001). Corn planting moderately enhanced soil bacterial community diversity and evenness, and significantly enriched the relative abundances of taxa, including Sphingomonas and Ramlibacter. LEfSe analysis identified that Sphingomonadales, Xanthomonadales, S0134_terrestrial_group, 0319_7L14, and Solirubrobacterales were biomarkers significantly enriched at the order level. Functional potential prediction via PICRUSt2 revealed enrichment of pathways associated with energy metabolism, membrane transport, cellular motility, and repair/replication/translation in corn-treated soils. In summary, corn phytoremediation can significantly accelerate Bap degradation while concomitantly improving the composition, structure, and potential functions of soil microbial communities, thus providing an economical, eco-friendly, and sustainable strategy for Bap bioremediation in contaminated environments.