Background: To quantitative evaluation of parafoveal microvasculature changes in eyes with exudative circumscribed choroidal haemangioma (CCH) compared with age- and gender-controlled healthy eyes.Methods: This was a cross-sectional, case-control study. 82 eyes of eighty-two subjects including 41 eyes of forty-one subjects in the exudative CCH group and 41 eyes of forty-one subjects in the age- and gender-controlled healthy eye group were enrolled in this study. Optical coherence tomography angiography (OCTA) was performed in each subject, and the capillary density (CD) of superficial plexus, deep capillary plexus, and the choriocapillaris as well as the area of foveal avascular zone (FAZ) were noted and analyzed between two groups.Results: The CD of the superficial plexus (44.51 ± 3.58 % vs 47.93 ± 2.94%) and deep plexus (47.75 ± 5.60% vs 52.66 ± 5.04%) of retina as well as the vessel density of choriocapillaris (54.42 ± 6.36% vs 61.83 ± 3.65%) significantly decreased in eyes with exudative CCH compared with age- and gender-controlled healthy eyes (all P < 0.001). Although we found that the FAZ areas in the exudative CCH group was larger than that of the healthy eye control group (0.30 ± 0.11mm2 vs 0.27 ± 0.87mm2), however, no statistical significance was found between two groups (P = 0.164).Conclusions: OCTA is a rapid, non-invasive, high-resolution procedure with which could monitor the parafoveal microvasculature changes in eyes with exudative CCH. We found that not only the CD of the superficial plexus and deep plexus but also the CD of choriocapillaris significantly decreased in eyes with exudative CCH compared with age- and gender-controlled healthy eye group.Trial registration: This study was registered on the https://www.clinicaltrials.gov (trial registration number: NCT04449900)