The invention provides a speed ratio follow-up control method capable of ensuring a stable and smooth material level. The method comprises the steps that a prediction model of a sintering end point is built, and the sintering end point is accurately predicated in real time; according to the interval range of the material level, what kind of working condition that the current material level is located is judged; different speed ratio control strategies are selected in a manner of corresponding to two expert rules; according to the selected speed ratio control strategy, the speed ratio is adjusted in an on-line manner, the material level can be reasonably adjusted according to the changes of the speed of a trolley, and the material level is effectively stabilized within the normal range. According to the method, according to the tendency of the changes of the speed of the trolley, the speed ratio can be reasonably adjusted, the influence of the changes of the speed of the sintering trolley on the material level of a material groove can be effectively reduced, production safety is ensured, and system practicability is improved.