The utility model relates to a fix a position device of wind generating set driftage limit angle fast, including being used for the device body of locating assembly on wind generating set's yawer, be equipped with on the device body and contact block portion, should contact the rotation stroke that block portion is used for arranging the convex part on the corresponding limit cam of yawer, contact block portion is used for coordinating in order to fix a position corresponding driftage limit angle with the convex part contact block that rotates on the corresponding limit cam that puts in place. Utilize the contact block position of the convex part of contact block portion through confirming corresponding limit cam on the device body to confirm corresponding driftage limit angle, so, can predesign the position that contacts block portion, can be effectual confirm driftage limit angle, do not need again by the manual work in advance with the aerogenerator unit extreme position of extreme position in order to confirm corresponding limit cam that go off course, driftage adjustment operation is convenient, adjusts efficiently.