针对瞬时速度教学中变与不变辩证关系的缺失现象,提出仅仅通过实验验证“Δt越小,平均速度越接近瞬时速度”尚欠深入。通过五个版本教材对比,发现鲁科版对瞬时速度蕴含的变与不变辩证关系进行了阐述。通过对高考参考答案的研究,证实瞬时速度教学渗透变与不变辩证关系的重要性。 Aiming at the lack of the dialectical relationship between change and invariability in the teaching of instantaneous speed, it is proposed that only the experimental verification that “the smaller the Δt is, the closer the average speed to the instantaneous speed”. Through the comparison of the five versions of textbooks, it is found that Luke version expounds the variable and invariable dialectical relationship contained in the instantaneous speed. Through the study of the college entrance examination reference answers, it confirms the importance of the instantaneous speed teaching infiltration and constant dialectical relationship.