The utility model discloses a bowl buckled type steel tube scaffold bottom reinforcing tube casing pipe construction device, and belongs to the field of building scaffolds. The bowl buckled type steel tube scaffold bottom reinforcing tube casing pipe construction device comprises an adjustable base bottom board (6), an adjustable base lead screw (7), an adjustable nut (3), a casing pipe (4), a stand bar (2) and a lower bowl buckle (1), and is characterized in that the casing pipe (4) is installed outside the adjustable base lead screw (7), a bottom reinforcing tube (5) is fixed to the casing pipe (4) through a steel tube buckle part, the adjustable nut (3) is installed above the casing pipe (4), and the casing pipe (4) is located between the adjustable base bottom board (6) and the adjustable nut (3). The construction device is simple and stable in structure, and convenient to install and use.