The invention relates to an experimental instrument, in particular to a non-shaking compound pendulum starting device. The non-shaking compound pendulum starting device comprises a knob, a fixing clip, a slide way upper clip, a chock block, a slide way lower clip, a bracket, a handle, a rotating wheel, a rotating handle, a slide strip, a chock strip and snap rings. The upper end of the bracket isprovided with the fixing clip with the side face in an F shape. The right end of the slide strip is provided with the horizontal chock strip which is vertical to the slide strip and has a rectangularsection. A part of the rotating handle positioned between the slide way upper clip and the slide way lower clip is provided with screw threads. The outer end of the rotating handle and the rotating wheel are coaxial and are formed into a whole, and the edge of the rotating wheel is provided with the handle integrated with the rotating wheel into a whole. In the invention, a swing rod can be ensured not to twist in the process of swinging, the experimental error caused by tremor is avoided, and the accuracy of the experimental results is enhanced.