The present work aims to propose an analysis of the metaphysical problem of identity and persistence of physical objects based on the hylomorphic doctrine, that is to say, the doctrine according to which the physical objects are mereological compositions of the elements named form and matter. After introducing the discussion about the problem of identity and persistence of the physical objects we shall propose a formulation of the mereological hylomorphism based on the work by Micheal Wedin on Aristotle´s theory of substance.