The invention relates to a determining method and a measuring system of safety retreat distance of side personnel under the action of train wind. The determining method comprises the following steps: measuring aerodynamic force born on the human body model positioned at a test point under the action of the train wind by adopting a full-scale human body model in a real train experiment, monitoringthe change of point velocity and pressure in the train wind with time; and obtaining transient pressure impaction on main parts of the human body model in the train wind. The invention can accuratelyevaluate the safety retreat distance of the side personnel in a train, systematically and scientifically measure the aerodynamic influence of the train wind to the personnel on a station and near thetrain line through the human body model and the actual measurement experiment, provide accurate digital basis for safety evaluation of the high speed train operation, and reasonably use the experimental result to evaluate the safety retreat distance of the working personnel and the passengers. The measuring system has reasonable structural design, and can effectively eliminate the interference ofvarious factors to obtain reasonable and accurate experimental result.