In recent years,with the improvement of the waterway grade,the scale of the design navigation ship has been increased,and the requirements of the navigation clearance scale have increased,and the conditions of navigable waters in bridge area have changed significantly.The bridge exists ship collision risk,it is necessarry to implement the assessment of bridge and ship collision venture,which provides a reference for the anti-collision facilities engineering to protect the bridge.At home and abroad,accidents that cause bridge collapse or serious damage are gradually increasing,and an average of one large bridge is damaged or even collapsed every year. The waterway grade of Beijiang River channel Wushi to Sanshui estuary segment is promoted from grade IV to grade III after the channel regulation,the bridge exists the ship collision risk.Based on AASHTO probabilistic model of ship and bridge collision,the influences of the parameters on the ship bridge collision are probability analyzed,the annual collision probability of the ship collision with each wading bridge pier is calculated,the annual frequency of the collapse of the bridge pier is obtained.