【】? Objective: To investigate the application of fetal HQ technique in the assessment of fetal heart morphology and function in hypertensive disorder complicating pregnancy (HDCP). Methods : Forty-eight pregnant women with HDCP who underwent regular antenatal ultrasound examination and delivered at the Shanxi Maternal and Child Health Hospital 28-40W from March 2022 to November 2022 were selected as the case group, and 52 normal pregnant women were selected as the control group during the same period. The fractional area change (FAC) was calculated by speckle tracking technique, and the left and right ventricular shortening rates (GSI) were also obtained. The correlation between gestational week and GSI, FAC and SI in the control group was analysed by Pearson correlation. The t-test was used for measurement data between the two groups, and the Wilcoxon signed-rank test was used for measures that did not conform to a normal distribution, to compare and analyse the differences between the values between the two groups. Results: The correlation between gestational week and GSI, right and left ventricular FAC and right and left ventricular 24SI in the control group was not statistically significant (P>0.05). the difference between the GSI index in the HDCP group and the control group was statistically significant (P<0.05). the difference between the right and left ventricular FAC index in the HDCP group and the control group was statistically significant (P<0.05 The Z scores of left and right ventricular FS in the HDCP group were statistically significant (P<0.05) when comparing the left and right ventricular FS with each other, and the right ventricular FS was statistically significant (P<0.05) when comparing the right and left ventricular FS in the HDCP group with the control group.The Z scores of left and right ventricular FS in the HDCP group were statistically significant (P<0.05) when comparing the left and right ventricular FS with each other, and the right ventricular FS was statistically significant (P<0.05) when comparing the left and right ventricular FS in the HDCP group with the control group. SI values were statistically significant (P<0.05) when comparing each other, SI of left ventricular segments 2-16, SI of left ventricular segments 1 and 17-24 were not statistically significant, and SI of right ventricular segments 1-24 were not statistically significant (P>0.05). CONCLUSION: Fetal HQ can be used to assess the morphology and function of the HDCP fetal heart.