Supporting assembly and four-axis cylindrical machine

The utility model relates to the technical field of four-axis cylindrical surface machines, and particularly discloses a supporting assembly and a four-axis cylindrical surface machine, the supporting assembly comprises a cylindrical surface machine base and a supporting platform, a vertical plate is arranged on the surface of the cylindrical surface machine base, a rotating rod is arranged in the vertical plate, a conveying belt is sleeved on the surface of the rotating rod, a motor is arranged at one end of the rotating rod, and the supporting platform is arranged on the surface of the conveying belt; the cylindrical surface machine has the beneficial effects that a workpiece is placed on the supporting platform to be supported, then the clamp is used for clamping the workpiece, the cylindrical surface machine can be used for machining the workpiece, after machining is completed, the motor can be started to enable the conveying belt to move, and therefore the supporting platform can be driven to move; and t