원래 이름 기록: NINGBO JINLUN MAGNET TECHNOLOGY CO., LTD.

A sintered cerium-iron-boron and a preparation method thereof. The preparation method includes the following steps: melting and blending all raw materials, cooling, crushing, powder milling, magnetically forming, isostatic pressing, sintering, solution treating, first stage aging, and second stage aging to obtain a product; melting and blending a first phase alloy and a second phase alloy to obtain a diffusion source; and then subjecting the product to a diffusion treatment with two diffusion stages using the diffusion source to obtain the cerium-iron-boron.