To explore the method of using PFWD to detect the compactness in the airport soil area, and achieve the purpose of fast detection of compactness, according to the characteristics of the airport soil area, Guanghan Airport was taken as the test site, and the relationship between the dynamic elastic modulus and the compactness of the filler in the airport soil area was explored combined with PFWD. A three-dimensional finite element model was established to calculate the mechanical response of fillers under different moduli. The PFWD field test results were verified by using traditional methods. The results show that the difference between PFWD test results and those of traditional method was relatively small, and PFWD can be used for the rapid detection of soil density in Guanghan airport.