水的反常膨胀是热学中的重要知识点，但由于盛水的容器也随温度而变化，故不能用常规方法来演示水的反常膨胀，以致教学中无法进行实验演示，使学生难以信服．我们通过深入研究，采用“容器膨胀补偿法”来达到盛水容器的实际容积不变，从而突破了长期来教学中不能演示的缺憾． The abnormal expansion of water is an important knowledge point in thermal science. However, because the containers for water also change with temperature, conventional methods cannot be used to demonstrate anomalous expansion of water, so that experimental demonstrations cannot be performed in teaching, making it difficult for students to be convinced. Through in-depth research, we used the “bulk expansion compensation method” to achieve the same volume of the water container, thus breaking through the shortcomings that could not be demonstrated in long-term teaching.