Aiming at the external impact of the bimetallic lined pipe caused by third-party threats such as anchoring, numerical simulation is used to study the structural response of the bimetallic lined pipe subjected to external impact loads. The effects of different anchoring speeds, impact directions, pipeline operating conditions, operating pressure and anchor mass on the performance of the bimetallic lined pipe are investigated. The results show that: the damage of the bimetallic lined pipe increases with the increase of anchoring speed and anchor mass; the degree of liner separation shows a different response with the impact direction; the impact perpendicular to the pipeline axis causes the most serious damage and the smallest liner separation; the greater the internal pressure of the pipeline, the smaller the indentation damage of the pipeline and the smaller the degree of liner separation; if the pipeline is empty, the damage to the pipeline is the largest, and the degree of liner separation is the largest.