Submarine bimetallic lined pipe is steel pipe with low price and excellent corrosion resistance. Aiming at the external impact of the bimetallic lined pipe caused by third-party threats such as anchoring, numerical simulation was used to study the structural response of the bimetallic lined pipe subjected to external impact loads. The effect of different anchoring speeds, impact directions, pipeline operating conditions, operating pressure and anchor mass on the performance of the bimetallic lined pipe was investigated. The results show that the damage of the bimetallic lined pipe increases with the increase of impact energy, caused by the increase of anchoring speed or anchor mass. It was found that the degree of liner separation shows a different response with the impact direction. Impact perpendicular to the pipeline axis causes the most serious damage and the smallest liner separation. In addition, 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.