Steel bar positioning device for concrete beam and steel bar construction method of concrete beam

The invention provides a steel bar positioning device for a concrete beam and a steel bar construction method of the concrete beam. The steel bar positioning device comprises two vertical supporting parts, a bearing beam, a plurality of clamping parts and a plurality of abutting parts, wherein the two vertical supporting parts are arranged oppositely; the bearing beam comprises an upper beam partconnected between the upper parts of the two vertical supporting parts and a lower beam body connected between the lower parts of the two vertical supporting parts, a plurality of positioning groovesare correspondingly formed in the upper beam body and the lower beam body, and main steel bars of the concrete beam are embedded in the positioning grooves; the clamping parts for clamping stirrups ofthe concrete beam are arranged, the clamping parts are installed on the inner sides of the two vertical supporting parts oppositely; and the abutting parts abut against the inner side of a formwork of the concrete beam and are