Under condition of complex conditions, this test is made, and two campus scenes are selected for field being at low-altitude wireless channel measurement with 2.4 GHz frequency. Multi-path amplitude values of 1 200 groups and 1 200 groups of channels are collected respectively. The corresponding root-mean-square time delay extension and Rice factor of the two small-scale fading characteristics are analyzed with statistical methods, and the fitting is made up. The test results show that the average root-mean-square delay spread of the two scenarios is 255 ns and 1 429 ns respectively, and the average Rice K factor is 3.8 dB and 0.32 dB respectively, and the ratio of the former Rice K factor being greater than 0 dB is 58.68%, indicating that the Rice channel is the main channel in this environment. The proportion of the latter being greater than 0 dB is 10.16%, indicating that Rayleigh channel is the main channel in this environment. The fitting results show that the root mean square delay extension is a Gamma fitting, and the Rice K factor is a normal fitting, and the probability density distribution functions of the two characteristics are obtained.