Fans are an essential component of the engine cooling system, which is used to dissipate the excess heat generated by the combustion of fuels inside the engine.Thetube axial flow fan was designed and modeled usingCATIAV519software.And to simulate ANSYS Workbench R15.0.During every startup and shutdown of tub axial fan, the blades are subjected to bending stress, centrifugalforce. This leads to structural damage that is the failure of fan severely and can reduce the life of fanblades.In this paper 301 stainless steel cooling fan blade replaced by E-Glass Epoxy, fatigue and modal analysis of the fanhas been carried out using ANSYS. The existing materials of 301 stainless steel fan blades have no evidence tonumber of cycles before fatigue failure occurred andtheexactfatigue life. In order to predict the exact fatigue life span of the fan blades and to prevent premature failure occurrence in natural frequency.Based on the available design data a fatigue analysis is carried out, the results of the simulation were documented. The maximum pressure applied on the surface of the blade is 687.104 Pa, so that to determine the various parameters.Fatigue life of 301 stainless steel is 106 cycles and E-Glass Epoxy composite axial fan 107cycles to failure were occurred. Amodalanalysis of the fanisperformed,in order to comparethe operating speed frequency andthenatural frequency generated from fan. In modal analysis the first six natural frequencies werecompared to the frequency generated from fan operating speed. This is done to avoid resonance phenomenon which cause the vibrationfailure. Compared each of them operating frequency less than natural frequency.So that fan can run safely in the operating conditions.Finally E-Glass Epoxy composite fan blades have high reliability has been developed.