By means of the monte-carlo method based on the binary collision approximation, this paper investigates sputtering caused by fusion α-particles at the first wall of stainless steel (Fe0.73Cr0.18Ni0.09). The parameters adjusted in accordance with a comparison of the calculated and measured sputtering yields of the elements Fe, Cr and Ni were used to study the partial sputtering yields, energy distribution, angular distribution and depth distribution of origin of the sputtered particles, as well as the dependence of those quantities with the angles of incidence. The results show that by taking into account the energy and incidence angle distribution, the averaged sputtering yield of α-panicles in stainless steel is about 0.375, and the higher energy component of α-particle plays minor role so far as sputtering is concerned.