The invention belongs to the technical field of the construction of continuous rigid frame aqueducts, and particularly relates to a construction method for a joint section of a continuous rigid frame aqueduct. In order to solve the problems that because water flows through the continuous rigid frame aqueduct, integral force of the continuous rigid frame aqueduct is higher than that of a highway bridge or a railway bridge, so that the continuous rigid frame aqueduct cannot be constructed by a conventional joint method, the invention further provides the construction method of the joint section of the continuous rigid frame aqueduct. The construction method comprises the following steps of performing side span joint construction and a middle span joint construction, wherein side span joint construction is firstly performed, and then the middle span joint construction is performed; and before the joint construction, disassembling a hanging basket module and performing construction by a hoisting frame, wherein the joint construction process comprises the following steps of mounting the hanging basket, mounting a joint section module, performing strengthening framework construction, performing concrete construction, performing prestress construction and performing mud jacking. According to the construction method disclosed by the invention, a conventional hanging bracket construction method is changed, before the joint construction, the hanging bracket module is disassembled and the hoisting frame is mounted, so that the problem of offset loading of a cantilever beam caused by gravity of the hanging basket is solved, the operation of the joint construction is facilitated, and the bearing distribution uniformity of the joint section is improved.