The invention discloses a driving task complexity quantitative evaluation method for a complex overtaking scene, and belongs to the technical field of automatic driving. Through the combination of animplementation process of the driving task complexity quantitative evaluation method for the complex overtaking scene and an implementation formula of the driving task complexity quantitative evaluation method for the complex overtaking scene, the problems that an existing algorithm cannot quantitatively calculate the influence of road users on the task complexity of a first-level form of an 'overtaking' decision of main vehicles due to the fact that an existing environmental task complexity quantitative evaluation method does not pay attention to the mutual influence of the road users and driving tasks of the main vehicles, and a quantitative evaluation method for the complexity of the "overtaking" driving task under complex conflict scenes is not proposed is solved, and thus the quantitative calculation of the influence of the road users on the complexity of the first-level form of the 'overtaking' decision of the main vehicles is realized.