Blood purification, as a critical medical intervention for renal function replacement, metabolic waste clearance, and homeostasis maintenance, relies heavily on the optimization of therapeutic solutions to ensure clinical efficacy. In recent years, significant advancements have been made in the formulation design, biocompatibility, and clinical outcomes of blood purification solutions, driven by progress in clinical medicine and biomedical engineering. This article systematically elaborates on the latest research developments in key therapeutic solutions, including continuous renal replacement therapy replacement fluids, hemodialysis dialysate, hemodialysis catheter lock solutions, and peritoneal dialysate. By synthesizing current evidence, the aim is to offer scientific guidance for clinicians in selecting optimal treatment regimens while exploring future directions and emerging trends in the development of blood purification solutions.