Disclosed is a household entertainment semi-submersible submarine, comprising a housing (1), a power device (2, 2') and a transmission device (3, 3') mounted inside the housing (1), a guide device (4), and a driving member (5, 5') mounted at the tail of the housing (1), wherein the power device (2, 2') drives the transmission device (3, 3'); the transmission device (3, 3') comprises a magnetic gear pair (100), and the transmission device (3, 3') drives the driving member (5, 5') to rotate by means of the magnetic gear pair (100), thus driving the submarine to advance. The submarine can be driven by manpower to advance, and can either dive into the water or float on the water with a good sealing performance and a high safety, and is suitable for popular entertainment.
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