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Based on the multi-configuration Dirac-Fock method,theoretical calculations are carried out for the dielectronic recombination (DR) rate coefficients and the collision excitation rate coefficients of Sn10+ ions.It is found that the total DR rate coefficient has its maximum value between 10eV and 100eV and is greater than either the radiative recombination or three-body recombination rate coefficients (the number of free electrons per unit is 1021 cm3)for the case of Te ＞1 eV.Therefore,DR can strongly influence the ionization balance of laser produced multi-charged tin ions.The related dielectronic satellite cannot be ignored at low temperature Te＜5 eV.