Multifunctional exhaust device of engine test bed

The invention discloses a multifunctional exhaust device for an engine test bed, which comprises a mounting rack, an upper exhaust pipeline, an upper exhaust adjusting mechanism and a lower exhaust system, and is characterized in that the mounting rack is arranged on the outer side of an exhaust tower; the upper exhaust pipeline is used for being aligned with an exhaust port in the top and/or the side face of an engine so as to collect exhaust of the engine and conduct silencing conveying to exhaust the exhaust into an exhaust tower. The upper exhaust adjusting mechanism is used for adjusting the axis position of the upper exhaust pipeline relative to an exhaust port in the top and/or the side face of the engine and the air entraining angle of the upper exhaust pipeline relative to the exhaust port in the top and/or the side face of the engine. The lower exhaust system is used for being aligned with exhaust ports with different angles in the bottom of the engine, and then gas exhausted from the exhaust ports