Disclosed herein are a bean curd and a manufacturing method thereof. The method comprises washing and immersing soy beans in water; mixing the soy beans with clean water, grinding the soy beans and removing dregs to produce a bean paste; simmering the bean paste; straining soymilk from the bean paste; coagulating the soymilk with a natural coagulant comprising Japanese apricot vinegar, apple vinegar and ENA mineral A to afford a silken bean curd; and pressing the silken bean curd in a mold. The bean curd can be stored for a long period of time, and that can provide beneficial minerals, and a manufacturing method thereof.