under the construction condition of ensuring the current busy traffic, the rapid and accurate prefabrication and assembly of large-span portal pier bent cap has become a difficulty in the design and construction of prefabrication and assembly.?The construction technology of new cluster reinforcement connecting sleeve is adopted, that is, the conventional grouting sleeve is adopted at the side pier side, and the new multi-point cluster reinforcement prestressed connection is adopted at the middle pier side, so as to realize the smooth and accurate butt joint between the precast column far away and the overall precast gate pier cap beam under complex site conditions.