High-power ultra-short pulse train is highly demanded in many areas, however, the limited average power and low energy utilization constrain the application of ultra-short pulse train. Our method is based on nonlinear soliton effect, which is different from locking mechanism. Using an amplitude-modulated continuous wave radiation as pumping source, we numerically simulate the stable generation of high-power ultra-short pulse train. The input parameters such as pump power, modulation depth, modulation frequency and the optical fiber parameters including nonlinear coefficient, group velocity dispersion coefficient, are studied, respectively. In order to comprehensively consider how various parameters affect the pumping efficiency, we introduce the normalized modulation frequency. The results show that choosing a fiber with a small nonlinear coefficient and a large group velocity dispersion, introducing an appropriate increase in modulation frequency and modulation depth, high average power output can be ensured and a relatively high pumping efficiency is obtained. However, a smaller pump power is beneficial to energy extraction.