The invention discloses a turnout mechanism, a rail system and a control method of the turnout mechanism. Both opposite ends of the turnout mechanism are respectively connected with one input rail anda plurality of output rails; the turnout mechanism comprises turnover platforms, connection rails, a driving device and a control device, wherein a plurality of connection rails are respectively arranged on different working faces of a plurality of turnover platforms, and the connection rails positioned on different working faces are different in extension direction; the driving device is connected with the turnover platforms and is used for driving the turnover platforms to be turned over; the control device is connected with the driving device and is used for controlling the driving deviceto work according to a received control signal to enable the output ends of the connection rails different in extension direction to be connected with one of a plurality of output rails so as to change a rail direction of the rail system. The turnout mechanism disclosed by the invention is compact in structure and can adapt to a narrow mountain space; an occupied area of a turnout is reduced; a train turnout requirement is rapidly responded; a gear train is guaranteed to stably and reliably replace an operation rail.