According to the applicability conditions for three types of internal solitary wave theories including Korteweg-de Vries, extended KdV and Miyata-Choi-Camassa, the double push-pedals wave-generating method, the velocity-inlet wave-generating method and the mass source wave-generating method were developed y in a two-layer fluid of finite depth. Series of numerical simulations were presented to compare the results and efficiency of the three wave-generating methods. Results showed that even though all three methods can generate internal solitary waves, the velocity-inlet method and the mass source method were better than the double push-pedals method in terms of numerical simulations. The efficiency of simulation was the highest for the velocity-inlet method, followed by the mass source method, and the lowest for the double push-pedals method.%以3类内孤立波理论(Korteweg-de Vries、 extended KdV和 Miyata-Choi-Camassa)的适用性条件为依据,在有限水深两层流体中分别构建了双推板、速度入口、质量源3类内孤立波数值造波模型。通过系列数值模拟,对3类方法的数值造波效果和效率进行了比较。计算结果表明,3类数值造波方法均能生成内孤立波；数值造波效果方面,速度入口、质量源两类方法均优于双推板方法；数值造波效率方面,速度入口方法效率最高,质量源方法其次,而双推板方法效率最低。
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