Gas exhaust manifold for straight four-cylinder worm wheel supercharging engine

The invention discloses a gas exhaust manifold for a straight four-cylinder worm wheel supercharging engine. The gas exhaust manifold comprises a first cylinder gas channel, a second cylinder gas channel, a third cylinder gas channel, a fourth cylinder gas channel and a gas exhaust outlet, wherein a gas outlet flange is arranged on the gas exhaust outlet; the gas exhaust outlet consists of a semicircular first gas exhaust outlet and a semicircular second gas exhaust outlet; the first gas exhaust outlet serves as an outlet of the first cylinder gas channel and the fourth cylinder gas channel; and the second gas exhaust outlet serves as an outlet of the second cylinder gas channel and the third cylinder gas channel. Through adoption of the gas exhaust manifold, gas exhaust turbulent flow can be reduced, and the gas exhaust energy loss can be reduced.