Current therapies cannot simultaneously address the interconnected metabolic, cardiac, and renal damage in Cardiovascular-Kidney-Metabolic (CKM) syndrome. This study investigated ACF210, a novel long-acting dual agonist targeting both GLP-1 and APJ receptors, as a potential treatment for type 2 diabetes (T2D)-induced CKM syndrome. ACF210 was synthesized by fusing the human IgG4 Fc fragment to the C-terminus of GLP-1 and the N-terminus of Elabela-21 (ELA). In vitro receptor activation assays confirmed that ACF210 effectively activated the GLP-1 and APJ receptor signaling simultaneously. db/db leptin receptor-deficient mice and high-fat diet/streptozotocin-induced T2D were treated with dulaglutide, Fc-ELA, or ACF210 for 12 weeks. We assessed tissue morphology, organ function, and serum biomarkers. Compared to the diabetic control mice, ACF210 significantly improved blood glucose control and pancreatic β-cell function. Crucially, ACF210 demonstrated superior multi-organ protective effects over other treatments. Specifically, ACF210 reduced hepatic steatosis and provided comprehensive cardiac protection by lessening mitochondrial damage and fibrosis, enhancing diastolic function, reducing heart failure biomarkers such as NT-proBNP, and promoting microangiogenesis. In the kidneys, ACF210 alleviated podocyte damage and thickening of the glomerular basement membrane, while improving renal function as indicated by reduced levels of urinary albumin-to-creatinine ratio (UACR) and serum cystatin C. In conclusion, ACF210 not only effectively alleviates dysglycemia by potentially enhancing β-cell function but also significantly protects against diabetes-associated hepatic, cardiac, and renal damage, supporting its further exploration for the clinical management of CKM syndrome.