Research conclusions: The results showed that the connection transfer force characteristics of the friction － typed multiple － row bolt depended on the external load，the contact surface condition and the equivalent cross － section stiffness． The slippage between the core plate at the front and end rows bolts and the contact surface of the splicer，the design gap value between the bolt and keyhole and the load bearing capacity of the shear － loaded hole wall were considered as the criterion for the limit condition of the load bearing capacity of the connection of the multiple － row bolt．The force transmission ratio of of the joint bolts on the front and rows of long － row friction － typed high － strength bolt was the biggest． The limit load bearing capacity of the node of real bridge met the design requirement．