Wire EDM is a non-contact machining process of contouring different intricate shapes from bulk material. The phenomenon behind material removal is high temperature due to spark in the wire the material melts and vapours. This process enables the manufacturer to fabricate new high-temperature resistive material. The wire is made of brass on which the analysis has been carried out. The existing work deals with Thermal modelling of spark using ABAQUS CAE software. The material of wire considered is brass. Heat transfer is transient in nature due very small time available to single spark. The variation of heat flux and temperature were analyzed by results obtained from modelling.