This paper presents the design optimization of linear induction motor. Application of linear induction motor includes various industrial processes like conveyor belt, vertical movement, steel power plant, induction heating and automated material handling. All these applications require an efficient and high torque providing linear induction motor. Objective function of the optimization problem discussed in this paper includes efficiency, output thrust and machine weight. Various machine design parameters have been used as constraint variables. Optimization done with Quasi-Newton process shows significant improvement in machine efficiency and output torque compared to the results reported in literature. Machine design and optimization is carried out using RMxprt software.