A two-stroke air-powered engine assembly, which includes: an engine body, which the body includes a cylinder, a cylinder head system, an intake pipeline, a discharge pipeline, a piston, a connecting rod, a crankshaft, a discharge camshaft, an intake camshaft, a front gear box system and a back gear box; said piston being connected to the crankshaft via the connecting rod; said front gearbox system being adapted to transmit the movement of the crankshaft and the camshaft (800,200); an air throat hole for the compressed air intake and a discharge hole for the exhaust gas discharge being provided on the said cylinder head system; a high pressure gas tank set which is connected to an external charge device via a pipeline, wherein said two-stroke air-powered engine assembly also includes a constant pressure tank which is connected to the high pressure gas tank set via a pipeline; wherein an intake speed control valve which is communicated with the constant pressure tank via a pipeline; wherein a controller system, and an electronic control unit ECO which controls the intake speed control valve on the basis of the detected signal of a sensor (24,242); wherein said front gear box system includes a polygonal cover, transmission gear, crankshaft gear, gear idle, intake camshaft gear, discharge camshaft gear; wherein the movement from crankshaft is transmitted by crankshaft gear through the gear idle to intake camshaft gear which drives the intake camshaft and discharge camshaft gear which drives the discharge camshaft; characterized in that said engine assembly further includes a multiple-column power distributor, said multiple-column power distributor including five stages, and being made up of a first stage, a second stage, a third stage, a fourth stage and a fifth stage, each stage including an inner gear ring, a planetary gear and a sun gear, wherein the planetary gear in each stage only spins around its own axis, and does not revolve around the corresponding sun gear. an engine body, which the body includes a cylinder, a cylinder head system, an intake pipeline, a discharge pipeline, a piston, a connecting rod, a crankshaft, a discharge camshaft, an intake camshaft, a front gear box system and a back gear box; said piston being connected to the crankshaft via the connecting rod; said front gearbox system being adapted to transmit the movement of the crankshaft and the camshaft (800,200); an air throat hole for the compressed air intake and a discharge hole for the exhaust gas discharge being provided on the said cylinder head system; a high pressure gas tank set which is connected to an external charge device via a pipeline, wherein said two-stroke air-powered engine assembly also includes a constant pressure tank which is connected to the high pressure gas tank set via a pipeline; wherein an intake speed control valve which is communicated with the constant pressure tank via a pipeline; wherein a controller system, and an electronic control unit ECO which controls the intake speed control valve on the basis of the detected signal of a sensor (24,242); wherein said front gear box system includes a polygonal cover, transmission gear, crankshaft gear, gear idle, intake camshaft gear, discharge camshaft gear; wherein the movement from crankshaft is transmitted by crankshaft gear through the gear idle to intake camshaft gear which drives the intake camshaft and discharge camshaft gear which drives the discharge camshaft; characterized in that said engine assembly further includes a multiple-column power distributor, said multiple-column power distributor including five stages, and being made up of a first stage, a second stage, a third stage, a fourth stage and a fifth stage, each stage including an inner gear ring, a planetary gear and a sun gear, wherein the planetary gear in each stage only spins around its own axis, and does not revolve around the corresponding sun gear.