Objective To simplify the 41-item Chinese Medical Constitution Questionnaire and evaluate its performance to make it more suitable for intervention evaluation. Methods Combining expert opinions

the variability method

the total correlation coefficient method

the Cronbach α coefficient method

the factor analysis method and the critical ratio method were used to screen the items to form a short version scale. Subjects were then included in the constitution intervention to evaluate the responsiveness

reliability

and validity of the simplified scale. Results The simplified Chinese Medical Constitution Questionnaire contained 30 items. The standard response mean（ SRM）and effect size（ ES） absolute values of the scale ranged respectively from 0. 21 to 0. 58 and 0. 15 to 0. 40

which were similar to the 41-item Chinese medical constitution questionnaire. The Cronbach α coefficient was 0. 51 to 0. 75 with good internal consistency. The extracted 8 factors showed that the scale had good structural validity

and it could better distinguish between different constitution subjects and subjects before and after intervention. Conclusion The Chinese Medical Constitution Qquestionnaire is simplified to 30 items

and the performance evaluation is good

which is beneficial to the evaluation of the effect of physical intervention and the improvement of filling efficiency.