The invention provides a speed display system. The system comprises a front head sensor group, a front head signal processor, a first processing interface circuit, a front head display and a front head display interface circuit. The front head sensor group is located on the rotational axis of the front head, and the front head sensor group is used for acquiring a first rotational speed signal of the rotational axis of the front head; wherein, the train comprises a front locomotive head and a rear locomotive head; an input terminal of the front headstock signal processor is connected with the front headstock sensor group to enable the front headstock signal processor to convert the first rotational speed signal into a speed signal of the train. The signal end of the first processing interface circuit is connected with the output end of the front head signal processor, the first bus end of the first processing interface circuit is connected with the bus end of the front head display interface circuit through a data bus, and the first signal end of the front head display is connected with the signal end of the front head display interface circuit, so that the front head display displays the speed information of the train according to the speed signal of the train, and the accuracy is high.