高考科目选择不仅影响学生的学业发展方向，还直接关系到我国科技人才的专业分布与未来储备。基于STEM管道理论，通过对全国七省市普通中学科学教育调查数据分析发现：活动课程和科技竞赛能促进学生选择物理科目组合，而统计调查则起到阻碍作用。主题班会和课外活动对学生选择物理科目组合的影响不明显。活动课程通过增加早期接触、职业意识和资源获取，提升学生选择物理科目组合的可能性。科技竞赛则主要通过增强早期接触和职业意识，增加学生选择物理科目组合的机会。相反，统计调查主要通过削弱职业意识和资源获取，降低学生选择物理科目组合的概率，且这种阻碍作用在县域高中尤为明显，而在地市级高中则略有促进作用。建议动态调整高中科学教育的实施方案，强化科学教育的专业性和个性化指导，增加科学教育资源投入，促进地区间科学教育的均衡发展。

Subject selection for the college entrance examination is one of the core elements of the new college entrance examination reform. Most of the existing studies on subject selection for the college entrance examination focus on individual and family background influences, neglecting the consideration of science education at the school level. Based on the STEM pipeline theory and structural equation modeling, this study, after analyzing the survey data on science education in general secondary schools in seven provinces and cities across China, found that activity courses and science and technology competitions had a facilitating effect on students’ choice of physics combination subjects, while statistical surveys showed a hindering effect; however, the effects of theme class meetings and extracurricular activities on students’ subject choice were not obvious; at the same time, the activity courses had a significant impact on students’ choice of subjects by increasing their knowledge of science-related content, career awareness, and access to resources, thereby facilitating students’ choice of physics subject combinations. Science and technology competitions, on the other hand, increased the likelihood of students choosing physics subject combinations by increasing early exposure and career awareness. In contrast, statistical surveys decreased the likelihood of choosing a physics subject combination by decreasing the level of career awareness and access to resources. Furthermore, the negative impacts of statistical surveys were mainly found in county high schools, while the positive impacts were found for students in urban high schools.