In order to evaluate the accuracy and representativeness of GStarDZN2 automatic soil water station, provide a reference for alternative artificial soil moisture and promote the use of it. With contrasting difference, the difference probability and correlation analysis methods, the author statistically analyzed the GStarDZN2 automatic soil moisture stations and the parallel artificial soil relative humidity contrast observation datum of Yongchang County on May 3, 2012 to October 28 periods. The results showed that, the trend of automatic station data and manual observation over time was consistent. 20-30 cm soil layer probability difference was minimum distribution, data consistency was the best, 30-40 cm, 10-20 cm, followed by it. The 70-80 cm and 90-100 cm soil layers were poorer performance. Contrasting the correlation of automatic datum and manual observed datum in each layer showed significant. As a result, GStarDZN2 automatic observation station data could replace manual observation data.