The review paper presents the design and development of a Cyclone Separator, a device which uses centrifugal force to separate particulate matter (solid and liquid) from flue gases and its utilization for various particulate matters like vegetable oil, cigarette smoke, wood dry, pollen grain etc. Cyclone Separators are used in variety of places due to their versatile applications, low maintenance and low cost e.g., sawmills, cement industries, residential filtration etc. The main aim of this work is to study about the flow field, velocity and pressure distribution and effect of variation of inlet angle at entry passage of Cyclone Separator using CFD analysis. The study shall help in understanding the working of Cyclone Separator and variation of efficiency with the change in the inlet angle for different particulate matters.