Abstract: The rational construction of the beam and slab prefabrication yard to some extent determines the success or failure of the main project. This article discusses the construction of a triangular beam and slab prefabrication yard on a high-speed road in Zhongshan, analyzes the technical problems of foundation reinforcement, construction process optimization, quality control, etc., and forms a comprehensive prefabrication yard construction plan. The research results show that the problem of insufficient bearing capacity, excessive settlement and uneven settlement of soft soil foundation in coastal mudflat can be effectively solved by using block stone replacement and laying a thick stone powder layer; The combination support structure of pile foundation, expanded foundation and frame ring beam can significantly improve the pull-out resistance of the beam making pedestal foundation. At the same time, the use of a movable sunken pedestal design can effectively reduce the diagonal pressure generated during the tensioning of prestressed steel bars, avoiding cracking at the end of the beam due to compression. The bending device adopts a roller structure with an inner self-lubricating copper sleeve, which can achieve free rotation of prestressed steel bars and effectively reduce the loss of prestress in steel strands. In addition, setting up a reverse arch can effectively reduce the deflection of the beam after tensioning, and at the same time, a simple fixing device can be made at the end of the steel reinforcement skeleton binding to avoid secondary cutting and installation. The use of a combined drainage system of large vertical and small horizontal ditches can quickly drain accumulated water from the site, indicating that the rational construction of the beam and slab prefabrication yard has greatly improved the efficiency of construction management. The research results of this article provide technical guidance and theoretical basis for the construction of prefabricated beam and slab component yards on highways and similar engineering projects.