Variable intake manifold, engine and vehicle

The invention discloses a variable intake manifold, an engine and a vehicle. The variable intake manifold comprises an intake manifold body and a baffle. A first air channel is formed in the intake manifold body. The intake manifold body is provided with a baffle channel communicated with the first air baffle. The baffle can move along the baffle channel and has a stretching-out state of blocking the first air channel and a shrinking state of shrinking into the baffle channel. The variable intake manifold further comprises a driving mechanism to enable the baffle to be switched between the stretching-out state and the shrinking state. The engine comprises the variable intake manifold. The vehicle comprises the engine. The variable intake manifold has the advantages of being simple in structure, convenient to install and maintain and low in manufacturing cost.