The utility model belongs to the technical field of automobile engines, and particularly relates to an engine cylinder cover exhaust passage structure. The existing engine cylinder cover exhaust passage is optimized and modified. The engine cylinder cover exhaust passage structure comprises two exhaust passage inlets, an exhaust passage outlet and an exhaust door, wherein the two exhaust passage inlets are connected with the same cylinder burning chamber, the exhaust passage outlet is connected with an exhaust manifold, and the exhaust door controls opening and closing of the exhaust passage inlets. The engine cylinder cover exhaust passage structure is characterized in that the sum of areas of the two exhaust passage inlets is larger than area of the exhaust passage outlet, and proportion of a distance from an exhaust passage junction point to the exhaust passage outlet and the total length of the exhaust passage ranges from 0.15 to 0.2. The engine cylinder cover exhaust passage structure increases response speed of a low-speed turbine in the engine, reduces exhaust interference between two exhaust branches, and is favorable for increasing low-speed exhaust property of the engine.