Isospin effect of multifragmentation for the finite nuclei 112Sn and 132Sn is studied by using a phenomeno-logical asymmetric nuclear equation of state and an isospin dependent quantum molecular dynamics (IQMD) model. The initial distribution of nucleons in phase space is randomly sampled by using temperature dependent Hartree-Fock method in coordinate and momentum space respectively, and dynamical evolution of nucleons is described by IQMD. Various initial density contribution for the intermediate mass fragment (IMF) production is analyzed at a certain temperature. It is found that the isospin effect gradually vanishes with the temperature increasing as shown in Fig.1.
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