Abstarct: Turbine flow meters used in Compressed Natural Gas stations (CNG) in abundance, to measure the volumetric flow rate of the inlet gas. These types of flow meters are very sensitive to oscillating and pulsating flows. When the station’s reciprocating compressor starts to work, due to the piston and valve performance, pulsating flow will create in the suction line and downstream of turbine flow meter. This pulsation makes false pulses in the flow meter and finally makes difference among the measurement of gas flow from the metering of the gas company and the amount of gas that have been sold at the station. In this study, numerical simulation of snubber was investigated after turbine flow meter and before entering gas to compressor. The goal is eliminating or reducing the effects of operating compressor in CNG station on turbine flow meter and reducing measurement errors. Governing equations modeling was done for compressible fluids and viscous flows, turbulent and non-slip condition on the walls. Turbulent equations were solved with Navier-Stokes equations. For solving these equations, finite volume method, SIMPLE algorithm and Realizable k -ε turbulence model have been used. Numerical simulation of snubber was investigated by Ansys-Fluent CFD software for a CNG station with the gas inlet pressure 17.1bar, inlet and outlet pipe diameter of 2 inches. In this project, several parameters, including increasing volume to minimum volume ratio according to API 618, the impact of distance between snubber and compressor to reduce pulsation, height to diameter ratio in the cylinder of snubber, and also putting a simple blade with name “baffle” in the cylinder, to achieve the best design and geometry of snubber were checked. Comparing Fluent numerical method with previous studies show less than 2% difference that present validity and reliability of results. Results have showed that with an increase in volume to more than 5 times the minimum volume, the amplitude of pulsation would decrease less than the maximum amount limit of 1.6% pressure line. Also increasing the distance between snubber and compressor has significant impact in decreasing pulsation but result have showed no difference between snubber with baffle and without it.