The utilization of immobilized laccase to degrade and remove phenolic pollutants in water has promising application prospects. However, maintaining the activity and stability of the immobilized laccase remains a significant challenge. In this work, an amino acid-based ionic liquid (IL) modified magnetic composite material (IL-Magnetic gelatin) was prepared as a support for laccase immobilization. We conducted a detailed characterization of the nanocomposite and it exhibited excellent magnetic responses and dispersion. The catalytic performance of the immobilized enzyme was also investigated. Compared to free laccase, the immobilized laccase (Lac-IL-Magnetic gelatin) exhibited higher catalytic activity and better thermal stability. The various interactions (hydrogen bonds, ionic interaction) between enzyme molecule and ionic liquid can cause conformational rearrangement of laccase. Lac-IL-Magnetic could degrade 98.6 % of 2,4-dichlorophenol (2,4-DCP) within 20 h and maintained 55.2 % activity after 10 cycles. Moreover, the biocatalyst is easy to recycle using magnet. The results indicated that Lac-IL-Magnetic gelatin holds significant potential for the degradation of phenolic substances in environmental wastewater.