ABSTRACT -- This paper introduce how to design Trajectory for controlling motion on X-Y plane. We arrange Motion in 2 types which one is Point to Point Motion and another is Continuous Motion by the details of them we would focus on designing Trajectory for Continuous Motion analyzed in 2 methods including the differences of two kinds of Motion and disadvantages of those methods. The first method is Combined Velocity Profile By Acceleration Curve and another is Combined Velocity Profile By constant Acceleration. The experimentation on this paper is simulated from cutting machine so this experimentation could be applied in related CNC field.