Abstract: Provided is a marine tank transfer refueling system. The marine tank transfer refueling system includes a first hose, an aviation fuel pump, a filter separator, a flowmeter, an automatic regulating valve and a second hose. The filter separator has a first communication port, a second communication port, a third communication port, a fourth communication port and a fifth communication port. The first communication port communicates with the aviation fuel pump. The second communication port communicates with the flowmeter. The fourth communication port communicates with a first fuel port of the return fuel tank through an air discharge valve. The fifth communication port communicates with a first pipeline between the aviation fuel pump and the first hose, a second fuel port of the return fuel tank communicates with the first pipeline. The return fuel tank further has a fuel unloading port for releasing residual fuel.