Objective：To investigate the value of cardiac magnetic resonance（CMR）based right ventricular-pulmonary arterial coupling（VAC）parameters in assessing risk stratification of connective tissue disease-related pulmonary hypertension（CTD-PH）. Methods：The clinical and CMR data of 62 patients with CTD-PH between June 2018 and April 2022 were retrospectively analyzed， and they were divided into group 1（low-risk and low-to-moderate-risk patients，n=39）and group 2（moderate-to-high-risk and high-risk patients，n=23）according to risk stratification，and the patients’right and left ventricle-related volumetric and functional parameters， left ventricular tissue characterization parameters and VAC were statistically analyzed. The optimal model was sought to predict CTD- PH risk stratification. Results：The differences in right ventricle-related volumetric and functional parameters，and tissue characterization parameters of the right ventricular insertion were statistically significant in the two groups of patients with CTD -PH （P < 0.05）. The right ventricular end-diastolic point（RVIP）volume index（RVEDVI）and VAC were independent predictors，and the combination of RVEDVI and VAC had the best predictive accuracy（AUC=0.839，95% CI：0.735~0.944，P < 0.001）. Conclusion： Right ventricle-related volumetric and functional parameters，and RVIP tissue characterization parameters can be used to assess CTD- PH risk stratification；the combination of RVEDVI and VAC improves the accuracy of assessing risk stratification.