The invention discloses a hammer drill type power tool, which comprises a hammer mechanism (6) for realizing a hammering function, a drill mechanism (7) for realizing a drilling function, an operation mode switching mechanism, wherein the hammer mechanism (6) and the drill mechanism (7) are both driven by a motor (5) arranged in a shell (1) and can be switched in states of transmitting torque andcutting off torque transmission through respective sliding clutches; the operating mode switching mechanism comprises an adjusting knob (9) and a shifting fork (10); the adjusting knob (9) and the sliding clutch of the drill mechanism (7) are connected; the shifting fork (10) and the sliding clutch of the hammer mechanism (6); the adjusting knob (9) is movably connected with the shifting fork (10) and drives the shifting fork (10) to be under a first position and a second position; when the shifting fork (10) is under the first position, the hammer mechanism (6) can transmit torque; and when the shifting fork (10) is under the second position, the hammer mechanism (6) can cut off torque transmission and the drill mechanism (7) can transmit torque.