The invention provides a PBA construction technique and relates to the technical field of construction of urban subway stations. According to the PBA construction technique, the technical problems of large potential safety hazards and construction risks in the construction process of pilot tunnels are solved. The PBA construction technique comprises the steps that earthwork of the four pilot tunnels which are arranged at intervals is excavated in a transverse channel through a bench method; the four pilot tunnels are constructed through the principle that the edge pilot tunnels are excavated firstly, and then the middle pilot tunnels are excavated; primary support is conducted in the excavating process of the pilot tunnels; then drilling is conducted on the pilot tunnels through a reverse circulation drilling machine, and thus edge pile holes 5 or middle pile holes 6 are formed; after drilling, holes are poured, and thus edge piles and middle columns are formed; and the earthwork between every two adjacent pilot tunnels is excavated, and thus a communicating structure is formed. The construction technique is simplified, a lower pilot tunnel does not need to be excavated, pile hole excavation is completed by the mechanical drilling machine, so that the construction safety coefficient is increased, the number of constructors in the channel is decreased, and the engineering cost is reduced.