Objective To investigate the satisfaction of standardized residents' trainees with different background , and puts forward suggestions for improvement, so as to provide reference for relevant research. Methods In January 2019, a semi-open questionnaire survey was conducted to 186 resident trainees in a third-grade comprehensive hospital in Beijing from 2015 to 2018. The results were analyzed by chi-square test, logistic regression and other methods. Results The total satisfaction of resident trainees to the training base institution was 89.8% (167/186); the total satisfaction of master's degree students 78.0% (39/50) was lower than that of commissioned training 94.4%(84/89) (χ²=4.013,P＜0.01)and self-training residents 93.6%(44/47)(χ²=4.784,P=0.029),the differences were statistically significant; the total satisfaction of the patients in non-surgical departments 75.8%(25/33) was lower than that in medical technology departments 92.6%(63/68), the differences were statistically significant(χ²=4.246,P=0.039). The total satisfaction of residents' trainees with an average monthly income of more than 3 000 yuan is 5.649 times that ofresidents' trainees with an average monthly income of less than 3 000 yuan (OR=5.649,95%CI=1.022~31.238). Conclusions The overall satisfaction of resident trainees to the training base institution was high, and can be further improved by paying attention to the different status and majors of the residents,solving the existing problems and increase their salary.