Abstract: Objective To investigate the detection rate of microalbuminuria（MAU） and the relevant influencing factors for MAU in Chinese hypertensive patients. Methods A cross-sectional survey was conducted from November 2016 to August 2017. A total of 181 053 hypertensive patients were recruited from 600 hospitals across China. A questionnaire was used to collect information including patients’ risk factors, disease conditions and the usage of anti-hypertensive drugs. Blood pressure was measured, and urine albumin to creatinine ratio（UACR） was determined by urine strip. Based on the combined risk factors of hypertension and atherosclerotic cardiovascular disease（ASCVD）, the patients were divided into different groups. Results Finally, 136 483 patients with hypertension were screened.（1） The blood pressures were significantly higher in patients with MAU compared with those without MAU, in patients with risk factors and ASCVD compared with other hypertensive patients, in patients treated with combination therapy compared with those treated with single drug（all P＜0.001）.（2） The detection rate of MAU in all screened patients was 28.2%（95%CI 28.0%-28.5%）, while in hypertensive patients with risk factors and ASCVD was the highest（33.4%, 4 966/14 885）.（3） Multivariate logistic regression analysis showed that the younger patients（＜45 years vs 65-85 years, OR=1.22, 95%CI 1.16-1.28, 45-＜65 years vs 65-85 years, OR=1.07, 95%CI 1.05-1.10）, female gender（vs male, OR=1.13, 95%CI 1.10-1.15）, body mass index（BMI）≥28 kg/m~2（vs BMI＜28 kg/m~2, OR=1.05, 95%CI 1.00-1.10）, living in Western China（vs Eastern China, OR=1.28, 95%CI 1.24-1.32）, living in Northeastern China（vs Eastern China, OR=1.76, 95%CI 1.66-1.88）, hypertension combined with ASCVD and risk factors（vs simple hypertension, OR=1.23, 95%CI 1.18-1.28）, and combination therapy（vs monotherapy, OR=1.18, 95%CI 1.15-1.21） were positively related with MAU. Conclusions The detection rate of MAU is the highest in hypertensive patients combined with risk factors and ASCVD, and their blood pressure control is poor. Therefore, risk factor control and blood pressure management should be strengthened.