The invention discloses a concrete-steel structure and pouring method for construction on a construction site. The concrete-steel structure comprises a foundation raft, and the section of the foundation raft is in a U shape and is splayed outwards gradually from bottom to top. A reinforced concrete base beam is further mounted at the top of the foundation raft. Columnar steel is mounted at the center of the foundation raft. A steel wire layer is arranged outside the columnar steel and is formed by fixedly hinging binding wires together. Extra-column stirrups are further arranged between the columnar steel and the steel wire layer. The reinforced concrete base beam and the columnar steel are connected through a through hole which is formed in the reinforced concrete base beam, and an anchor bolt is mounted in the through hole. A three-dimensional orthogonal structure is adopted, concrete is poured layer by layer during pouring, steel bar structures are connected in an overlap welding mode in the pouring process, and thus the probability that the interiors of the steel bar structures are hindered by concrete latex is further lowered; and all the components supplement one another, the crush resistance and the tension resistance of the whole structure are higher, and a good mechanical property is achieved.