Abstract: Five types of frozen soil automatic observational instruments were installed for field experiment at Kazuo station, Liaoyang station in Liaoning province and Manzhouli station in Inner Mongolia Autonomous region.The minute frozen soil data were collected from March to June 2019.These dataset were processed with the control of the time consistency and quality adopting the vertical and horizontal extreme value set method and compared with the manual timing data of the three stations.According to the manual observation data in the same period, the thresholds of abnormal suspicious data and abnormal data of automatic observation of frozen soil were recognized as 5 cm and 11 cm respectively, and the verification was carried out accordingly.The results show that the integrity rate of minute data of frozen soil automatic observation instrument is 99.59%.The average number of frozen soil layers observed with the automatic instrument is consistent with the manual observation, which is in line with the distribution characteristics of frozen soil data applied in business.The five types of frozen soil automatic observation instruments can better reflect the minute changes of frozen soil data in different climatic regions, and the quality control threshold of minute data from frozen soil automatic observation is reasonable and reliable.