Based on the tight binding scattering theoretical method ,the electronic structure of As adsorption on the surface of InP(110) is studied.The bulk material is described by a realistic empirical tight binding Hamiltonians ,the translationally invariant As/InP(110)(1×1) system is discussed in terms of the ordered As monolayer and an exchange reaction between surface P and As adatoms. Surface states and surface resonances are identified from the calculated local density of states along the four zone boundaries of the (110) surface Brillouin zone .In this calculation ,some ETB parameters are adjusted at the surface, the results are in good agreement with the experiment and are better than other theoretical results.