本文通过对大型工件(气浮轴承)退磁方案研究,介绍磁轭旋转局部退磁方法及其简易退磁装置.这种方法第一次应用于大型的结构复杂的局部带磁工件的退磁,与目前国内外几种退磁方法比较,具有工艺简易、成本低、退磁效果好、可靠等优点.这是一种值得推广的切实可行的退磁方法. This paper introduces the demagnetization method of yoke rotation and its simple demagnetization device by studying the demagnetization scheme of large workpiece (air bearing) .The method is firstly applied to the demagnetization of large-scale complex local magnetism workpiece, Compared with several other demagnetization methods, this method has the advantages of simple process, low cost, good demagnetization effect and reliability, which is a feasible demagnetization method that is worth popularizing.