The invention discloses an active power distribution network SCDN single-line graph cross point eliminating method based on detection. The method comprises the following steps of firstly, finding a cross point through graph detection; secondly, judging the type of the cross point; and finally, providing an eliminating method specific to the type of the cross point separately. According to the method disclosed by the invention, the cross point is found through graph detection, then the type of the cross point is judged, and then the cross point elimination method of the invention is executed, so that the number of cross points after using the method disappears.