The propeller shaft sealing devices, the cooling and lubrication forms of thrust shaft bearings, and the system principle of leakage recovery systems of two typical foreign marine podded propulsors are compared and analyzed. The results show that when the fixed-point pressure leakage recovery system and the vacuum leakage recovery system are used at the same time, the precision degree, automation degree, and recovery efficiency of leakage recovery system of marine podded propulsor are higher, and the propulsor safety is better guaranteed.