The chain system is the key part of the scraper conveyor,the sprocket and the chain hoop is key component of the chain system. The engaging force between the sprocket and the chain hoop and the abrasion of the influence each other. In order to research the connection of the engaging force between the sprocket and the chain hoop,we first established the visual prototyping model based on the MSC. ADAMS and analyzed the touch dynamics quality between sprocket and chink hoop when the scraper conveyor starts and are operated for a long time. We acquired the change law of the contact resultant force tangential force and normal force when the sprocket and the chain hoop are engaging,and the maximum engaging force and the corresponding position. Finally we analyzed the engaging force when the sprocket and chain hoop during the engaging progress based on the software of LS-DYNA,and indicated that the maximum engaging force and corresponding position,which provides a reference for the study of the engaging dynamics of sprocket and the chain hoop.