An oscillating power tool having variable oscillating angles comprises a housing comprising a head housing and a body housing connected to the head housing, a motor received in the body housing and comprised a driving shaft configured to rotate about a axis of the drive shaft, an eccentric unit disposed on the driving shaft and configured to rotate eccentrically about the axis of the driving shaft, an output shaft received in the head housing and configured to oscillate about the axis of the output shaft, the output shaft is capable of installing and driving a working head, a fork connected to the output shaft and configured to turn the rotating motion of the driving shaft to the oscillating motion of the output shaft by coordinating with the eccentric unit, the heading housing is operable to move relative to the body housing, the fork is configured to move relative to the eccentric unit and coordinate with the eccentric unit in different positions for different oscillating angles of the output shaft.