The utility model discloses a field ridging device. The field ridging device comprises a frame. The frame is horizontally arranged. A pulling bracket is arranged at the front end of the frame and connected with a power machine. A speed-changing gearbox is arranged at the front end of the frame and connected with a power output shaft of the power machine. A rotary tillage device, a soil separating device and two lateral ridging devices are sequentially arranged from front to back at the bottom of the frame. The rotary tillage device is used for turning up and smashing the soil. The soil separating device is used for separating the smashed soil into two sides. The ridging devices are used for ridging and shaping of the separated soil. The speed-changing gearbox drives the rotary tillage device. The field ridging device is capable of smashing the soil and ridging two smooth ridges at the same time with same size and high work efficiency.