Based on the field SPT, the Rational Spacing between Vibroflotation sand Piles in Aeolian Sand of the Mu Us Desert is studied in this paper. The results show that the spacing of 1. 4 m was the most effective pile spacing. It is suggests that the compaction effects mainly depend on the pile spacing under the same conditions of sand layers, vibration force, vibration frequency as well as the construction technology. Considering the inexpensive of the sand pile construction, the small pile spacing is recommended based on the analysis of the tests.