The invention discloses a blocking construction method for a dyke-dam reinforced concrete culvert pipe. After a concrete plug is poured on the lower reaches of the culvert pipe, a row of holes are drilled in the positions, at the top of a dyke or the top of a dam, of the culvert pipe, guide pipes are embedded into the drilling holes, and the culvert pipe is filled with concrete through the guide pipes so as to be blocked. The concrete is low in water consumption, large in slump and compact in self flowing, and the culvert pipe is easy to be full of the concrete. Moreover, the concrete is good in stability, free of bleeding and segregation and low in plastic shrinkage. Appropriate amount of mineral materials with a water absorption function are mixed into the concrete, after the concrete is solidified, water in the concrete is released out, self maintenance of the concrete is achieved, and drying shrinkage is avoided. Procedures are few, the process is easy, the construction period is short, and the construction quality is easy to control; formworks are saved, vibration is avoided, and construction machinery, manpower, energy, resources and investment are reduced; the construction condition is good, and safe and civilized production is guaranteed; the construction technology is high in adaptability, and the blocking construction method is suitable for culvert pipes of various sizes.