Abstract: The observational data of the round-trip sounder collected at Anqing, Changsha, Ganzhou, Nanchang, Wuhan and Yichang stations during an observation experiment from 9 June to 10 July 2018 are used to extract the parameters of gravity wave, including the energy density, natural frequency, wavelength and propagation direction. By studying and analyzing the parameters of gravity wave at these stations, the gravity wave from June to July in the experimental area is counted. Characteristics and horizontal differences as well as the differences between the up and down sections are compared between various sites. The main results are as follows: (1) The gravitational wave energy in this region is generally distributed in the range of 0.2 to 1.2 J/m³, with an average value of about 0.8 J/m³, and the potential energy is generally distributed in the range of 0.03 to 0.5 J/m³, with an average value of about 0.2 J/m³. (2) For the vertical wavelength, 90% of the samples are within the range of 1 to 2.5 km, and more than 50% of the samples are within the range of 2 to 2.5 km. The average wavelength is about 1.8 km. The horizontal wavelength is mainly distributed in the range of 200 to 800 km, with an average of about 600 km. The ratio of vertical wavelength to horizontal wavelength of gravity wave is very small, and the gravity wave propagates horizontally in the stratosphere. (3) There are obvious main propagation directions in the ascending and descending sections of most stations, but the characteristics of the main propagation directions are not the same. The northwest ward propagation prevails, followed by the northward propagation. This new type of data are suitable for the observation and analysis of gravity wave in the lower stratosphere. The data in the descending section can play an important role in the intense observations of gravity wave events. There are some differences between the results obtained in the ascending section and the descending section, but the differences in other parameters are small except for the horizontal propagation direction, and the results in the descending section are generally large except for the energy.