The invention relates to the field of rail transit heavy haul combined train locomotive wireless reconnection control, and discloses a method and device for assisting in generation of a locomotive neutral section passing signal. The method comprises the steps that the position of a locomotive is collected; the position is compared with a pre-stored neutral section forecasting zone and/or a neutral section forcing zone; and under the condition that the position arrives at the neutral section forecasting zone and/or the neutral section forcing zone, the corresponding passing neutral section signal is generated. The device comprises a collecting device used for collecting the position of the locomotive, and a control device used for comparing the position with the pre-stored neutral section forecasting zone and/or the neutral section forcing zone and generating the corresponding passing neutral section signal under the condition that the position arrives at the neutral section forecasting zone and/or the neutral section forcing zone. In this way, the effects that the position where the passing neutral section signal is generated is precisely determined, and the precision of a passing neutral section zone is improved are achieved under the low cost condition.