An engine rotating speed control method and apparatus are provided. The engine rotating speed control method comprises steps of collecting rotating speed of an engine during an upshift inertial phase, adjusting engine torque and clutch torque until the rotating speed of the engine reaches the preset rotating speed in the preset time when the collected rotating speed of the engine does not change according to a pre-set change curve. With the above technical scheme, rotating speed of the engine can be stably transmitted to rotating speed of a clutch input shaft corresponding to a target shift from rotating speed of the clutch input corresponding to a practical shift, so impact to a vehicle can be reduced and driving comfortableness can be improved.