The utility model relates to an electric generator controller for railway passenger trains, and the utility model is composed of an electrical generator voltage-stabilizing controller, a load voltage electric controller, and a protection circuit. The utility model is characterized in that the utility model is made of a PWM control chip and a VMOSFET high-power field effect tube to make load voltage and the charging voltage of storage cells satisfy in the electricity generating process of a generator. The utility model which is especially suitable for railway scenes to use has the advantages of novel structure, low cost and easy use.