EDM is the process of machining hard metals which are cannot be machined using conventional machining process. This method was developed in the late 1940s, has been accepted worldwide as a standard process in manufacturing of forming tools. EDM find a wide application in the machining of hard metals. EDM is mainly used in industries like prototype production, coinage die making and in small hole drilling.Inconel718 is a high nickel content alloy. Inconel718 was developed to meet the need for a nickel-base alloy suitable for manufacture into complex shaped components subject to a combination of high temperature, high stress, and high temperature corrosion. The inconel718 material is mainly used in aerospace, missile and marine industries. Due to their high strength these alloys are difficult to machine conventionally. For this reasons another alternative for their machining is EDM. The aim of this work is to give a review related to machining of Inconel 718 alloy on EDM which is carried out till now.