Multifunctional window opening and closing device

The utility model relates to a multifunctional window opening and closing device, and belongs to the technical field of opening and closing of doors and windows. The multifunctional window opening and closing device is simple and reasonable in structure and convenient to use, and enables a window to be horizontally opened and suspended downwards. According to the technical scheme, the multifunctional window opening and closing device comprises a lock base arranged on a window frame and a lock block which is arranged on a window sash and corresponds to the lock base, the window sash is hinged to the window frame through an upper hinge and a lower hinge, a handle and a transmission rod are arranged on the window sash, the handle is inserted into the transmission rod, the upper end of the transmission rod is connected with the lock block, the lock block and the lock base are controlled to be buckled or disengaged through different angles of the handle, and the upper edge of the window sash is connected with the window frame through a suspended-downward swing mechanism. The multifunctional window opening and closing device is mainly used for achieving opening and downward suspension of the windows.