The refrigerator is a device used for cooling purpose. It is one of the home appliances using mechanical vapour compression cycle in its process. Performance of the systems become the main issue and many researches are still ongoing to evaluate and improve the efficiency of any used system. Refrigerator consist of various important part such as, compressor, condenser and evaporator. These all components play main role in efficiency of refrigerator. If such components are having the heavy system then it may decrease the overall efficiency of refrigerator as they consume the more amount of power. Hence in this project we are working on the piston of compressor in refrigerator. As we known that the compressor used in refrigerator is a reciprocating type. Connecting rod is the intermediate link between the piston and the crank shaft. And is responsible to transmit the push and pull from the piston pin to crank pin, thus converting the reciprocating motion of the piston to rotary motion of the crank. The loads acting on this piston and crank shaft are cyclic in nature. Further in this project we will use the modelling and analysis software and ensure the weight reduction and optimisation of piston. The modelling software is CATIA and analysis software is ANSYS.