The invention discloses a single-line diagram layout method supporting mixed layout of expanded station buildings and non-expanded station buildings, and relates to a single-line diagram generation method. At present, a single-line diagram which is not expanded in a station building is usually used, and the current working requirement cannot be met. The method comprises the following steps: setting station building information, dividing station buildings into two layout requirements of unfolding and non-unfolding according to types, and storing the layout requirements of the station buildings;and the layout requirement of the station building is obtained, a single line diagram is generated according to the layout requirement of the station building, and the unfolding direction of the unfolded station building is consistent with the line trend. According to the technical scheme, a station house unfolding style and a station house non-unfolding style can be provided, a mixed layout modethat a part of station houses are unfolded and a part of station houses are not unfolded is supported, and the method is more flexibly suitable for various service scenes; and the unfolding directionof the unfolding station house is consistent with the line layout direction, the layout is clear, and intersection is less.