The invention provides a data processing method of continuous wave test for propagation model tuning, which comprises: step 1, calculating the distance between adjacent sampling sites in an original sampling site aggregate; step 2, deleting a part of the sampling sites according to the distance between the adjacent sampling sites in the original sampling site aggregate, to obtain a first sampling site aggregate, the distance between the adjacent sampling sites in the first sampling site aggregate being larger than or equal to the preset threshold; step 3, deleting a part of the sampling sites from the first sampling site aggregate to obtain a second sampling site aggregate, in the second sampling site aggregate, the number of actual sampling sites within the intrinsic length being larger than the preset threshold. The invention provides also a data processing device of continuous wave test for propagation model tuning, which comprises: a computation module, a first data processing module, a second data processing module and an output module. The invention can realize the judgment of sampling site number within the intrinsic length, which complies with the Lee's criterion, in the test with failure to correctly control the motion speed of the test terminal, and ensure the accuracy of the sampling sites.