According to the demand of the concept design of china spallation neutron source ( csns ) , the target station , i . e . the target , the reflector and the moderator have been simulated and optimized using monte carlo simulation software , nmtc / jam and mcnp4a , firstly . the neutron flux escaping from the target and the moderator and the heat deposition in the target , the reflector and the moderator are calculated . these results provided essential data as a basis of the spallation neutron source design 本论文结合当前中国散裂中子源( chinaspallationneutronsource ， csns )工程概念设计的迫切需要，选择国际上广泛使用的基于蒙特?卡罗方法，用于模拟粒子输运过程的程序mcnp4a和nmtc jam作为研究工具，首次对csns靶站进行了全面的模拟与优化，内容包括靶、反射体与慢化器系统的中子通量分布以及热量沉积，同时计算了靶的温度场与应力场分布。
