Compact reactor core applied to land mobile power supply and land mobile power supply

The invention provides a compact reactor core applied to a land mobile power supply and the land mobile power supply, relates to the technical field of nuclear reactors, and is designed for solving the problem that the structure of the existing land small-sized gas-cooled nuclear reactor is not compact enough. The compact reactor core applied to the land mobile power supply comprises a reactor core active area, a reflecting layer wrapping the periphery of the reactor core active area and a pressure bearing layer wrapping the periphery of the reflecting layer, the reactor core active area comprises a plurality of hexagonal fuel elements, and the plurality of fuel elements are closely arranged in a honeycomb shape; the center of the fuel element is a fuel rod with a circular cross section, and the hexagon is a coolant inlet channel; the fuel rod comprises uranium carbide fuel; the cooling agent is helium and xenon mixed gas. The land mobile power supply comprises the compact reactor core applied to the land mob