Objective Exploring the clinical value of quantitative assessment of left ventricular function in patients with hypertensive disorder complicating pregnancy by left ventricular pressure-strain loop technology. Methods 38 patients with hypertensive disorder complicating pregnancy (case group) and 42 healthy pregnant women of matched gestational age (control group) were selected for routine echocardiography examination. Left ventricular pressure-strain loop technology was used to measure left ventricular global longitudinal strain (GLS), myocardial global work index (GWI), global constructive work (GCW), global wasted work (GWW), and global work efficiency (GWE). The general data of the two groups were compared differences in conventional echocardiographic parameters and myocardial work parameters; Using Spearman correlation analysis to analyze the correlation between myocardial work parameters and systolic and diastolic blood pressure; Drawing a receiver operating characteristic (ROC) curve to analyze the diagnostic efficacy of various parameters in evaluating cardiac function in patients with hypertensive disorder complicating pregnancy. Results Compared with the control group, the systolic blood pressure, diastolic blood pressure, LAD, IVSD, LVPWD, GWI, GCW, and GWW in the case group increased, while GWE and GLS decreased, with statistical significance (all P<0.05). Correlation analysis showed that GWI, GCW, GWW were positively correlated with systolic and diastolic blood pressure, while GWE and GLS were negatively correlated with systolic and diastolic blood pressure (all P<0.05). ROC curve analysis shows that the sensitivity and specificity of myocardial work parameters GWI, GCW, and GWW in diagnosing left ventricular function changes in patients with hypertensive disorder complicating pregnancy are significantly higher than GLS and left ventricular ejection fraction, with GCW and GWW having the highest diagnostic efficacy.Conclusion The left ventricular pressure-strain loop technique has certain value in evaluating early left ventricular myocardial damage in patients with hypertensive disorder complicating pregnancy.