The invention discloses a pull-down emergency exit side window of a bus (shown in the figure in the abstract). The pull-down emergency exit side window of the bus changes a closed fixed side window tothe pull-down window, so as to greatly reduce the difficulty level of escaping for occupants and to improve the safety of the bus. A sealing strip arranged between a bus window glass and a bus body can not only serve as a slideway for the bus window glass but also take account of the sealing requirements of the bus, so as to reduce the vibration of the bus window glass.