The invention discloses a scarifier which comprises a rotating frame, wherein a rotating shaft is arranged in the middle of the rotating frame; the rotating shaft is mounted at the lower end of a push rod; a motor is arranged at the upper end of the push rod; the motor drives a driving shaft to rotate; the driving shaft drives the rotating shaft to rotate; handles are further arranged on two sides of the upper end of the push rod; the rotating frame is cylindrical; a scarifying bracket and a soil turning bracket are arranged on the outer circumference of the rotating frame; included angles formed between the scarifying bracket and the outer side surface of the rotating frame as well as between the soil turning bracket and the outer side surface of the rotating frame are less than 90 degrees. According to the scarifier disclosed by the invention, the scarifying bracket and the soil turning bracket are driven to rotate through the rotation of the rotating frame, so that scarification and soil turning are realized; through hand-guided arrangement, forwarding of the rotating frame is controlled by use of the gravity of the device and pressure and thrust of the hand-guided push rod.