The invention relates to a cable-type distribution network single line diagram aided drawing method. The method comprises the steps that a cable-type distribution network single line diagram aided model is established, drawing of all electrical devices in lines on a length and width fixed screen canvas is achieved, and a maximum switching interval within constraint is obtained; a thought solving model of a branch defining method is applied to obtain the size of a turning-on and turning-off station and an initial solution of the interval, a drawing is generated, then model parameter is adjusted according to a drawing display result, and the model is solved again till a satisfied drawing result is obtained. Therefore, a drawer can draw a cable-type distribution network single line diagram in an automatic distribution network system according to the coordinate and size of the final turning-on and turning-off station. By adopting the method, the drawer can determine the size and intervals of the turning-on and turning-off stations and other pixels according to the visual display diagram, the drawing time of the cable-type distribution network single line diagram is shortened, and the drawing quality is improved.