In order to improve the operational reliability of scraper conveyer, the coupling vibration characteristics between longitudinal and torsional pendulum of scraper conveyor are studied. Based on Voigt model and point-to-point tension method, the torsional vibration analysis model of scraper chain system is established. The influence area and attenuation characteristic of torsion pendulum vibration under material loading condition are studied. Based on the premise of solving reliability and precision, the maximum number of scraper plates of torsion pendulum vibration units in different sections along the line is determined, and a torsional pendulum vibration abbreviated model is constructed. The dynamic model of longitudinal and torsional pendulum coupling vibration of scraper chain system is established to study the longitudinal and torsional vibration characteristics of scraper chain system under load excitation. Theoretical and experimental studies show that: The maximum fluctuation of the speed and the tension of the scraper are 119.5% and 78.6%, respectively, in imposition of incentives caused by cargo incentive. The tension difference of two chains in the load excitation section is up to 8.6%, and torsion vibration caused by load excitation is more obvious under no material circumstances in the initial time.