Abstarct: Generating linear force directly has so many advantages as the independence of convertors and reducing system maintenance costs. Mechanical, aerodynamic, and pneodynamics systems including accelerators are replacing by electromagnetic systems, therefore magnetic accelerators use in industry and military applications is increasing. Accelerator's duty is to generate linear force, or in other words, to deliver an object at an acceptable speed over time, length, and possibly limited energy. In this study, a double sided linear induction motor(DSLIM) is used as an electromagnetic accelerator and the goal is to optimize the secondary sheet structure. First, the simulation has been done using Jmag-Designer FEM software, various secondary structures are examined after the model is verified. A 4kg load has been applied to this DSLIM. Optimization methods are as following: solid copper sheet thickness, solid aluminum thickness, secondary overhang, ladder slot ratio, slot’s width, and length, lateral distance as common methods, and laxyered secondary and beveling the angles as proposed methods. Using FEM for common methods leads to 36.21% increase in terminal speed and 44.41% increase in average speed. Proposed methods show 3.48% and 6.37% increase in terminal and average speed respectively. Using a 4kW 600mm DSLIM, experimental tests have been done verifying simulation results.