Abstract: In recent years, chloroquine phosphate (CQP) has been widely used as a specific drug for the treatment of COVID-19. Even after the epidemic ended, it still plays an important role because of its anti-inflammatory and anti-malaria capabilities. The widespread use of chloroquine phosphate poses serious potential hazards to the environment. Utilizing waste wood chips as resources, a nickel ferrite loaded biochar composite material (NiFe₂O₄@BC) with magnetic recovery was prepared by co precipitation anaerobic calcination method, and study the performance of activating peroxymonosulfate (PMS) to degrade CQP. The compositional structure, surface functional groups, and degree of graphitization of the NiFe₂O₄@BC composite were analyzed using various characterizations. Compared with unmodified fir sawdust biochar (BC), the loading of magnetic NiFe₂O₄ on the biochar resulted in an increase in the degree of graphitization of the composite, and an increase in the number of defective active sites, which led to a tremendous increase in the effectiveness of the removal of CQP. The effects of NiFe₂O₄@BC dosing, PMS concentration, initial pH of the solution, inorganic anions, and humic acid in the degradation of CQP were mainly investigated. Research shows that when NiFe₂O₄@BC under the conditions of 0.5 g/L dosage, 1.0 mmol/L PMS concentration, and 10 mg/L CQP concentration, the CQP removal rate reaches 89% in 120 min. The degradation of CQP is more favorable under acidic or alkaline conditions, and humic acid (HA) has a promoting effect on the degradation of CQP by NiFe₂O₄@BC-activated PMS. Quenching experiments confirm that •OH and ¹O₂ generated by the radical and non-radical pathways dominated the degradation of CQP by the NiFe₂O₄@BC/PMS system. Under the same conditions, it can achieve more than 80% degradation effect for many kinds of pollutants. In addition, the efficiency of CQP removal by activated PMS could still reach about 74% after NiFe₂O₄@BC was recycled 5 times. This study provides new strategies and reference significance for the efficient and green resource utilization of discarded fir sawdust.