Computer　simulation　is　a　significant　technology　on　making　great　scenes　of　crowd　in　the　film　industry.　However,　current　animation　making　process　of　crowd　motion　requires　large　manual　operations　which　are　time-consuming　and　inconvenient.　To　solve　the　above　problem,　this　paper　presents　an　editing　method　on　the　basis　of　mesh　deformation　that　can　rapidly　and　intuitively　edit　crowd　movement　trajectories　from　the　perspective　of　time　and　space.　The　method　is　applied　to　directly　generate　and　adjust　the　crowd　movement　as　well　as　avoid　the　crash　between　crowd　and　obstacles.　As　for　collisions　within　the　crowd　that　come　along　with　path　modification　problem,　a　time-based　solution　is　put　forward　to　avoid　this　situation　by　retaining　relative　positions　of　individuals.　Moreover,　an　experiment　based　on　a　real　venue　was　performed　and　the　result　indicates　that　the　proposed　method　can　not　only　simplify　the　editing　operations　but　also　improve　the　efficiency　of　crowd　motion　editing.　©　2020　Yong　Zhang　et　al.