In order to adapt to the observational condition of magnetic declination and inclination with the high resolution and precision magnetograph, the azimuths among 7 measurement platform sand 4 azimuth marks in reconstructed Jinghai station, Seismological Bereau of Tianjing, are precisely measured by using classical astro-geodetic method, and 38 parameters with average error ±1.2″ are gained. After the measurements, 7 sets of instrument can be used at same time in all-weather.