H-ADCP has been popularly used in domestic nowadays. However, the application is still very superficial. There are few people study the method of error control and parameter optimization, which influence the measurement accuracy of H-ADCP. In order to solve some difficult problems in the use of H-ADCP, this paper discussed the measurement error of H-ADCP in three aspects of error performance of flow meter method. Taking the test error as the result control, this paper analyzed the error sources and difficulties in application of H -ADCP. Some examples were used to illustrate the optimization method for improving the application accuracy. According to the method mentioned in this paper, some examination and optimization were made, which can help reduce the error of measurement and improve the accuracy of the H-ADCP method.