Ibn Taymiyyah claims that “Fixed Entities” should be considered as one of the important pillars of the Unity Theory. He believes that the stable non-existent and considering it as an object by Ibn Arabi is blasphemous and worse than Eternal Fixed (Sabetate Azali) which stated by Mutazila. This study attempts to discover Ibn aymiyyah’s ideas by descriptive-analytical method. Ibn taymiyyah can be considered as does not have enough knowledge about mysticism and its terms. since in all his works, he has criticized its principles and foundations with an academic and materialistic mind, as well as without paying attention to the common mystical language and terms. Fixed entities in Ibn Arabi's point of view, in second determination of the Almighty, have a fixed objectivity, not an existential object and is directly related to the manifestation of divine names and attributes. Accordingly, the believes that the divine names emerge through the path of the fixed entities and the external entities are the manifestations and existential effects of the fixed entities. Therefore, it should be said: neither the defects of the eternal fixed (Sabetate Azali) affect this theory nor the criticisms of Ibn Taymiyyah. Ibn Taymiyyah's critique is rooted in his ontological and epistemological foundations.