This invention relates to the field of construction technology for reinforcing bar binding in cap beams, specifically to a prefabricated reinforcing bar jig for cap beams and its binding construction method, including the following steps: construction preparation and
site planning; jig fabrication; reinforcing bar
processing and skeleton piece fabrication; and skeleton piece hoisting and binding. A prefabricated reinforcing bar jig for cap beams includes: a main support, consisting of side uprights and a main crossbeam made of I22 I-beams; an auxiliary work platform support, located at the end of the main support, made of 4×8 square steel; a bottom slot, located on the upper part of the main crossbeam, for positioning the skeleton pieces; an end crossbar, a pull-out round
tube structure, located at the end of the jig; a side movable buckle, located inside the side uprights; and a top fixed buckle, a detachable channel steel structure, located above the skeleton pieces. The jig components of this invention adopt a
modular design, allowing for arbitrary disassembly and replacement of various positioning slots. Different types of cap beam reinforcing bar skeletons can be fabricated and assembled on the same base, improving efficiency while reducing costs.