The invention discloses a partition-combined composite foundation with reinforced concrete piles and cement-soil piles comprising outer piles and inner piles. The arrangement area of the outer piles and the inner piles is the area covered by an embankment, and the distance between the edge of one side slope of the embankment and the centerline of the width of the cross section of the embankment is A. The outer piles are arranged at the area extending for 1/5A to 3/4A from the side slopes on both sides of the embankment to the centerline of the width of the cross section of the embankment, and the rest area is the arrangement area of the inner piles. The outer piles use the reinforced concrete piles with large pile-spacings and the inner piles use the cement-soil piles with relatively small pile-spacings. The partition-combined composite foundation with the reinforced concrete piles and the cement-soil piles solves the engineering problems that the outer piles are prone to brittle fracture under a large bending moment, and in result the brittle fracture of the inner piles occurs successively which further leads to the instability of the embankment and the reduction of the bearing capacity. The partition-combined composite foundation with the reinforced concrete piles and the cement-soil piles has the advantages of low cost, good control effect of the total settlement, full use of the compression resistance and the bending bearing capacity of the outer piles and high safety.