The present disclosure discloses a rotary frame and a grader, and relates to the field of a grader. The rotary frame includes: a rotary ring, provided with a recessed portion and an opening; a first connecting piece fixed at the periphery of the rotary ring, one end of the first connecting piece being attached to the periphery of the rotary ring and the other end of the first connecting piece being separated from the periphery of the rotary ring; a second connecting piece, the second connecting piece being also fixed at the periphery of the rotary ring, and one end of the second connecting piece being attached to the periphery of the rotary ring and the other end of the second connecting piece being separated from the periphery of the rotary ring; a supporting base fixed on an inner wall of the rotary ring and located in the recessed portion.

A work machine includes a vehicle body, a work implement including a blade, a plurality of actuators connected to the work implement, an operating device operable to change the posture of the blade, a sensor that detects a current posture of the blade, and a controller. The work implement is movably connected to the vehicle body. The plurality of actuators change a posture of the blade with respect to the vehicle body. The controller obtains the current posture of the blade. The controller determines target stroke lengths for the actuators, respectively, such that the blade is moved in a blade normal line direction from the current posture by a combination of stroke motions of the actuators depending on an operation to the operating device. The blade normal line direction is perpendicular to a lengthwise direction of the blade. The controller controls the actuators based on the target stroke lengths.