Multi-station switching processing datum aligning method for complex part

The invention discloses a multi-station switching processing datum aligning method for a complex part. The multi-station switching processing datum aligning method comprises the following steps: partblank clamping and positioning, rough processing datum establishing, fine processing datum establishing while milling a datum plane and stations with B equal to 0 degree, 90 degrees, 180 degrees and 270 degrees, wherein while a fine processing coordinate system is established, a datum plane distance is measured, processing origin of each station datum deviates onto the same point, and corresponding coordinate systems are separately called during processing on different stations, so that influences, on processing precision, of machine tool rotation errors are eliminated. 本发明公开了一种复杂零件多工位转换加工基准找正方法，分为零件毛坯装夹定位、粗加工基准建立、铣削基准面以及B=0°、90°、180°、270°工位时精加工基准建立，建立精加工坐标系时通过测量基准面距离将各工位基准的加工原点偏移到同一点上，在不同工位加工时分别调用对应的坐标系，从而消除了机床回转误差对加工精度的影响。