目的 探讨改良后本科生临床医学课堂教学评价量表在时效性、有效性和易用性方面的变化。方法 2018年9月-2019年9月选取四川大学华西医院2017级临床医学和口腔医学五年制本科生共30名，以及3名授课教师作为研究对象，将既往版、现行版以及改良版教学质量评价量表应用课堂，并采用问卷调查方法对其进行分析评估。评估经改良后的教学质量评价表在及时性、有效性和易用性方面的变化差异。结果 共计向研究对象发放99份教学质量评价量表和33份调查问卷，回收率为100%。针对授课教师能及时获取教学质量反馈，教师认为课后评教工具的最佳评价时机为课后当天晚上12点前（33.3%）或课后24小时内（66.7%），高于课后立即评价（0%）和期末评价（0%）。对三个版本教学评价表问卷调查结果显示，改良版教学评价量表的时效性、有效性和易用性为优的比例分别为86.67%，60%和76.67%，均高于现行版的43.33%，60%和46.67%，同时均高于既往版的23.33%，23.33%和36.67%，差异有统计学意义（P＜0.05）。结论 改良后的本科生临床医学课堂教学评价量表在时效性、有效性和易用性方面均得以显著提高。通过不断优化量表设计和评价指标，可以提高教学质量评价的科学性和准确性。

Objective: To investigate the changes in timeliness, validity, and usability of the modified classroom teaching evaluation scale for undergraduate clinical medical education. Methods: From September 2018 to September 2019, a cohort comprising 30 fifth-year undergraduate students majoring in clinical medicine and stomatology from West China Hospital, Sichuan University, along with three faculty instructors, was enrolled. Three versions of teaching evaluation scales (historical, current, and modified) were implemented in classroom settings, followed by questionnaire-based comparative analyses. The revised scale was systematically assessed for improvements in feedback timeliness, measurement validity, and operational usability. Results: A total of 99 evaluation forms and 33 questionnaires were distributed, with a 100% response rate. Regarding timely feedback acquisition, faculty preferred receiving evaluations by midnight on the teaching day (33.3%) or within 24 hours post-class (66.7%), outperforming immediate