The foundation treatment method which was mass stabilization in-situ was proposed in order to instead of the replacement method at the low filling embankment road,as to meet the bearing capacity of road design. The laboratory,theoretical calculation and field tests were applied to research on the mass stabilization and the bearing capacity.The composition and content of the curing agents were determined by the variation of unconfined compressive strength in the laboratory test. The analysis of using different ways of construction of ALLU mixing system in situ shows that the field strength and indoor strength ratio is between 0.37 to 0.66;The bearing capacity of mass stabilization was obtained from the load plate test, standard penetration test and static cone penetration tests using ALLU PMX (power mixing tool) in situ. And bearing capacity of mass stabilization in situ was compared with three different theoretical calculations. Design theory is put forward, providing the basis for the follow-up construction.