初中生物教材七年级下册“消化和吸收”一节中“探究唾液对淀粉的消化作用”是一个分组探究实验。然而,由于上课时间有限,且在取唾液时有一定的难度,有些学生不愿意动手去做。针对教学中的实际情况,笔者利用学校的现有设备进行了实验改进,保证了分组实验的顺利进行并达到了预期的实验效果。 Junior high school biology textbook seventh grade “digestion and absorption” section “to explore the saliva digestion of starch ” is a group of exploration experiments. However, due to limited time in class and difficulty in taking saliva, some students are reluctant to do it. In view of the actual situation in teaching, the author made use of the school’s existing equipment to improve the experiment, which ensured the smooth progress of the group experiment and achieved the expected experimental result.