The phenomenon of droplet impact on rotating walls is frequently encountered in engineering practices. For instance, icing on rotating components of aero-engines under low-temperature conditions is primarily induced by water droplet impingement on rotating surfaces. Consequently, investigating the dynamic behavior of droplets impacting rotating walls holds significant scientific and practical importance. This study employed high-speed photography to capture the dynamic processes of droplets with varying surface tensions impacting rotating walls, with a particular focus on the spreading and splashing phenomena during droplet impingement. The influence of surface tension, inertial force, and tangential force on the wetting length of droplets was systematically analyzed. Experimental results demonstrate that for droplets with low surface tension, increased inertial force induces circumferential splashing, whereas enhanced tangential force tends to generate tail-like splashing. Conversely, for droplets with medium or high surface tension, augmented tangential force promotes tangential spreading, while enhanced inertial force facilitates droplet retraction. The increase in both inertial and tangential forces contributes to the growth of wetting length, whereas elevated surface tension exerts an inhibitory effect on wetting length expansion.The phenomenon of droplet impact on rotating walls is frequently encountered in engineering practices. For instance, icing on rotating components of aero-engines under low-temperature conditions is primarily induced by water droplet impingement on rotating surfaces. Consequently, investigating the dynamic behavior of droplets impacting rotating walls holds significant scientific and practical importance. This study employs high-speed photography to capture the dynamic processes of droplets with varying surface tensions impacting rotating walls, with a particular focus on the spreading and splashing phenomena during droplet impingement. The influence of surface tension, inertial force, and tangential force on the wetting length of droplets is systematically analyzed. Experimental results demonstrate that for droplets with low surface tension, increased inertial force induces circumferential splashing, whereas enhanced tangential force tends to generate tail-like splashing. Conversely, for droplets with medium or high surface tension, augmented tangential force promotes tangential spreading, while enhanced inertial force facilitates droplet retraction. The increase in both inertial and tangential forces contributes to the growth of wetting length, whereas elevated surface tension exerts an inhibitory effect on wetting length expansion.