The invention discloses a method for controlling a dual-fuel locomotive. The method for controlling the dual-fuel locomotive includes steps that judging working conditions, to be specific, judging the working conditions of the locomotive according to running parameters of the locomotive; confirming target values, to be specific, acquiring target values of adjusting parameters of an engine and/or a motor based on the working conditions and power modes of the locomotive; adjusting, to be specific, acquiring actual values of the adjusting parameters of the engine and/or motor, and combining with the target values of the adjusting parameters of the engine and/or motor to dynamically adjust the running states of the engine and/or motor. Compared with an existing locomotive control method incapable of well meeting control requirements of the dual-fuel locomotive, the method for controlling the dual-fuel locomotive controls the locomotive more reasonably and perfectly through using different methods to control the dual-fuel locomotive under a single-fuel mode and a dual-fuel mode.