The invention discloses a europium-base multiple-ligand vulcanizing accelerator and a preparing method thereof. Europium is the rare earth element in synthesis, and 4 kinds of ligands are included, wherein the ligands 1 and 2 are accelerator groups with excellent vulcanizing acceleration effects, the ligand 3 is stearic acid improving solubleness of the accelerator in a rubber material, and the ligand 4 is citric acid forming strong coordination with the rare earth element. The method is simple and feasible, requires no protection of inert gases, is mild in the preparation condition and generates no harmful gas; the multiple-ligand rare earth vulcanizing accelerator has excellent solubleness in rubber, the vulcanization and scorch time is long, the vulcanization curve is excellent in flatness, and no toxicity, odor or pollution is generated; the accelerator substituting the conventional frequently used system adopting zinc oxide, stearic acid and accelerator together can be applied to high-performance tires and other rubber products.