The invention provides a magnetic connecting shaft type hand cranking small-flow LNG filling pump. The magnetic connecting shaft type hand cranking small-flow LNG filling pump comprises a rotating plate, a first drive
impeller, a second drive
impeller, a magnetic coupler, a first permanent
magnet, a second permanent
magnet, a thread rod, a first baffle and a second baffle; the second drive
impeller is arranged on the rear side in the pump body, the first drive iempller is arranged on the front side in the pump body, the magnetic coupler is arranged on the lower end face of the pump body, the first permanent
magnet is arranged in the pump body, and the second permanent magnet is arranged in a drive force
transmission system. Due to design, the problem that an original small flow LNG fillingpump is vacant is solved, the first baffle is arranged on the annular side face in a liquid inlet, the second baffle is arranged in the middle of the first baffle, a rotating plate is arranged on theupper side of the outer surface of the liquid inlet, and the thread rod is arranged on the lower end face of the rotating plate. Due to design, the problem that the original small flow LNG filling pump cannot adjust the
natural gas inlet amount is solved, the structure is reasonable, use is rapid and convenient, the flow adjusting is facilitated, and the cost is low.