Construction method of 200-meter-level high roller compacted concrete seepage-proof dam and seepage-proof dam

The invention discloses a construction method of a 200-meter-level high roller compacted concrete seepage-proof dam and the seepage-proof dam. The construction method prevents airflow from penetrating through a dam body to permeate a downstream area of the dam body disorderly with a method of front plugging and back draining, the front plugging refers to construction of a seepage-proof body on an upstream surface of the dam body, the back draining refers to laying a network of drain pipes on a junction surface between the seepage-proof body and the dam body, and water flow penetrating through the seepage-proof body is dredged through the network of drain pipes. The water flow penetrating through the seepage-proof body is prevented from causing direct impact on the dam body, so that safety of the dam body is ensured. The construction method of the 200-meter-level high roller compacted concrete seepage-proof dam and the structure can be adapted to requirements of technological development of roller compacted co