Based on the detection data of airborne microwave radiometer GVR (G-band water Vapor Radiometer) and Hotwire Liquid Water Content Sensor, cloud top brightness temperature of FY-2E satellite, radar reflectivity at Tanggu station of Tianjin and FNL reanalysis data from NCEP (National Centers for Environment Prediction) and NCAR (National Center for Atmospheric Research) on 20 November 2016, the distribution characteristics of water vapor and liquid water for typical stratiform clouds in Tianjin area are analyzed. The results show that the liquid water path of stratiform clouds in Tianjin area decreases with the increase of height from the bottom of clouds, and it drops to 0 mm at the height of ice cloud and above. The integrated water vapor content gradually decreases from the ground with the increase of height, and its value holds at 0.3-0.5 cm during the level flight at 3 500 m above clouds. The density of liquid water increases firstly and then decreases with the increase of height. The liquid water detected by GVR above the cloud base (900 m) is supercooled water. During the ascent of aircraft, the supercooled water is mainly distributed at the height of 900-2 400 m, and the maximum density is 0.63 g·m^-3. During the descent of aircraft, the supercooled water is mainly distributed at the height of 900-1 600 m, and the maximum density is 0.78 g·m^-3. Compared with the Hotwire Liquid Water Content Sensor, GVR can better reflect the supercooled water content of clouds, the height and thickness of the supercooled layers. The water vapor in Tianjing area mainly comes from the advection transport. The water vapor density increases continuously at the height of 400 m, and accumulates obviously near the cloud base, and then decreases rapidly. Within the height of 1 400-3 000 m, the water vapor density fluctuates little. With the approaching of precipitation, the maximum value of water vapor density and its corresponding height increases during the descent of aircraft, and the thickness of the high water vapor density layer increases, which can provide some references for precipitation prediction and weather modification.