The invention provides an ironing plate regulation mechanism. The ironing plate regulation mechanism comprises a first support seat, a second support seat, a third support seat and a fourth support seat, wherein a first connecting rod is arranged between the first support seat and the second support seat, a second connecting rod is arranged between the third support seat and the fourth support seat, a driving device is arranged between the first connecting rod and the second connecting rod, and one of the first connecting rod and the second connecting rod can independently rotate or drive the other connecting rod to simultaneously rotate. The ironing plate regulation mechanism is used for regulating an ironing plate, and when one of two connecting rods of the ironing plate regulation mechanism rotates, elevation angles of stretching segment ironing plates in the ironing plate are changed along with the rotation; when the two connecting rods both rotate, the altitude difference of the stretching segment ironing plates are changed along with the rotation. The ironing plate regulation mechanism is convenient to regulate and easy to operate. On the other hand, the invention further provides the ironing plate comprising the ironing plate regulation mechanism. Finally, the invention further provides a paving machine comprising the ironing plate regulation mechanism or the ironing plate.