The invention discloses a detection method for leaflet issuing behaviors. The detection method comprises the following steps: dividing a human body into 18 key points, namely a nose, a neck, a right shoulder, a right elbow, a right wrist, a left shoulder, a left elbow, a left wrist, a right hip, a right knee, a right ankle, a left hip, a left knee, a left ankle, a right eye, a left eye, a right ear and a left ear; arranging 17 limb skeletons, and the 17 limb skeletons are connecting lines of limb significance existing among the 18 key points; and when the camera or the camera directly faces the target person, establishing a behavior index of whether the target person issues the leaflet. The invention also discloses a detection system. Urban, street and city appearance managers are helped to quickly and effectively discover leaflet issuing behaviors, manpower is saved, event discovering and processing efficiency is improved, and the method has important value for development of smart cities.