In the field of drilling technology in the polar regions，the coring tools of armored cable type electric machinery are widely used. Optimizing and designing the anti-torque system to improve the anti-torsion is the key for the successful core drilling in sub-glacial bedrock with electric machinery coring tool. In order to analyze all the performance of anti-torque device，the simulation method based on digital virtual prototype RecurDyn is proposed. Anti-torque device is composed of planar six-bar mechanism; the inventor software is introduced into RecurDyn to establish the geometry model of anti-torque device, by which the motion simulation and analysis are carried out. The paper introduces the method and procedures of how to use the RecurDyn software to realize the motion simulation and the analysis on the planar six-bar mechanism (anti-torque device). With anti-torque device as the research object, the motion of anti-torque device is showed by animation in RecurDyn/post module and the chart is used to reflect the result of motion simulation, by which the science, the rationality and the practicability of anti-torque device design are proved and the predetermined position changing can be determined to satisfy the request of balance drilling in polar regions.