Abstract: The deviation of the installation azimuth of the magnetoelectric velocity sensor during the on-site blasting seismic wave test will affect the acquisition of correct test and regression parameter values， and then affect the safety judgment of the project and the determination of the blasting vibration law. Four sets of measuring points were arranged at different positions from the blast source with different horizontal installation angles，and blasting vibration tests were carried out on the field open-air deep hole bench blasting，so as to obtain blasting vibration data at different distances and different sensor installation azi⁃ muths. The analysis results show that the blasting vibration velocity peaks are also different at different sen⁃ sor installation azimuths at the same distance. The radial and tangential vibration velocity peaks have the greatest impact，and the maximum deviation can reach 184.68%. The vertical vibration velocity peak has little effect，and the maximum deviation is only 7.02%. At the same time，the regression value is also af⁃ fected by the installation azimuth of the sensor，and the tangential direction is the most obvious，followed by the radial and vertical directions.

Key words: blasting vibration, magnetoelectric velocity sensor, installation azimuth