采用一维Ｅｃｋａｒｔ势函数模拟化学反应势垒，研究化学动力学中单分子反应隧道效应，可得到Ｅｃｋａｒｔ垒图形及不同温度下ｋ_（ｕｎｉ），Ｅ_ａ及两个反应渠道间存在相互作用时ｋ_（ｕｎｉ（ｉ）），Ｅ_（ａ（ｉ））．计算结果可与实验结果比较。 One-dimensional Eckart potential function was used to simulate the chemical reaction barrier, and the single-molecule tunneling effect in chemical kinetics was studied. Eckart barrier graph and k_ (un), E_a and interaction between the two reaction channels were obtained at different temperatures uni (i)), E_ (a (i)). The results can be compared with the experimental results.