Abstract: The conventional study on scraper conveyor chain working condition only considers the bilateral same load chain working condition. This paper mainly studies the single side chain condition and its effect on the vibration char- acteristics of the scraper chain system torsional pendulum. The cause of the chain failure and the way of applying the load simulation are analyzed. Also,the paper investigates the mechanical model of scraper conveyor chain working con- dition,selects Voigt model to establish the dynamic model of scraper conveyor torsion pendulum vibration,uses Matlab software to establish dynamic equation and state equation,and constructs a function subroutine to the established dy- namic equation. The preprocessing of dynamic analysis is realized. The vibration speed,acceleration and tension of the torsion pendulum of the scraper chain system are obtained by simulation analysis under four different working condi- tions of different materials before and after the chain position,and the experimental results are verified. The results show that the chain process will cause a strong torsion vibration of the scraper chain system,and the torsional pendu- lum vibration is more obvious when there is no material at the beginning. In the case of both front and rear materials, the vibration of torsion pendulum weakens slightly.