The invention discloses an arranging method of a pile-plate retaining wall and culvert combination. The arranging method includes following steps: 1), determining central mileage X, width D and anglealpha of a culvert; 2), determining small-mileage direction pile central mileage K1, large-mileage direction pile central mileage K2 and pile central spacing L of anchoring piles; 3), determining pilethickness d and pile width b of the anchoring piles on two sides of the culvert until shearing-resistant and bending-resistant inspection and calculation requirements of the pile-plate retaining wall, and arranging corresponding anchoring piles on two sides of the culvert; 4), according to structural stress design of the culvert, arranging a corresponding soil retaining plate on the top face at an outlet end of the culvert; 5), sealing or filling gaps between an outlet structure of the culvert and adjacent anchoring piles and the soil retaining plate. The arranging method meets technical requirements on antiskid stability of a steep-slope roadbed and flood drainage, irrigation and traffic of the culvert and avoids the problems of difficulty and conflict in linking the pile-plate retainingwall and the culvert.