Puts forward a novel method that is called the method of pseudo base point, which is much simpler than the classic methods when used for analyzing composite motion of rigid multi bodies if the convected motion is planar motion and the relative motion is rectilinear motion. 首次提出用伪基点法进行多刚体系平面复合运动的速度和加速度分析,此法对牵连运动为平面运动、相对运动为同平面直线运动的问题求解比经典方法简便得多。