The invention provides a numerical control four-roller section-bending machine. The numerical control four-roller section-bending machine comprises a machine frame (1), an upper main roller (2), a lower main roller (3), a left side roller (4), a right side roller (5), a side roller oil cylinder (6), a lower roller oil cylinder (7), a hydraulic motor, a support roller (8) and other parts. The upper main roller, the lower main roller, the left side roller and the right side roller of the numerical control four-roller section-bending machine are combined to form an arc down-regulated structure, the upper main roller and the lower main roller are driving rollers, the left side roller and the right side roller respectively perform arc movement around respective middle axes under the effect of the side roller oil cylinder and simultaneously perform rotation movement under the effect of the hydraulic motor, and accordingly bending or rolling of sections is achieved. The numerical control four-roller section-bending machine can roll the sections to be round parts, arc-shaped parts, spiral parts and other parts, has a section pre-bending function, can roll angle steel, square steel, channel steel, I-steel, round steel, steel tubes and other sections after a die is replaced, is advanced in structure, reliable in work, small in volume and complete in function and has advanced section forming performance.