Marine tank transfer refueling system

A marine tank transfer refueling system, comprising a first hose, an aviation fuel pump, a filter separator, a flowmeter, an automatic regulating valve and a second hose which are connected in sequence, wherein the first hose is configured to be connected to a fuel supply tank, the second hose is configured to be connected to a fuel receiving tank, the marine tank transfer refueling system further comprises a return fuel tank, 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 third communication port is configured to be connected to a fuel unloading pipe and release residual fuel to an external device, 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, a position where the second fuel port and the first pipeline are connected is located upstream of a position where the fifth communication port and the first pipeline are connected, and the return fuel tank further has a fuel unloading port for releasing residual fuel, aviation fuel in the filter separator is capable of flowing back to the first pipeline through the fifth communication port to undergo secondary filtration.