The invention provides a cutter propping recognizing and removing method for five-axis inserting milling processing of a complete impeller. The method comprises the following steps: S1, recognizing of cutter propping, namely, determining whether circles at the bottom parts of cutters which are subjected to two successive inserting and milling are intersected; and if so, determining that cutter propping occurs; S2, selecting of a base rotating point, namely, selecting an inserting point, far away from an intersecting line, from two intersecting points between the circle at the bottom part of the cutter which is inserted and used for milling in the i time and an extending surface of a straight texture surface formed by axes of the cutters in a whole row; S3, removing of cutter propping, namely, rotating to obtain a new cutter axis and a new cutter position point; and S4, detecting of cutter propping, namely, returning to step S1; calculating to determine whether cutter propping occurs; and if so, repeating steps S2 and S3 until the cutter propping circumstance is removed. According to the method, the problem of cutter propping in inserting and milling is removed by adjusting the cutter axis vector and the cutter position point, and thus abnormal processing such as overload and vibration caused by cutter propping in inserting and milling can be avoided; and subsequent processing efficiency is not influenced while high inserting milling processing efficiency is ensured.