Solid reactor core high-temperature fuel element

The invention provides a solid reactor core high-temperature fuel element which comprises an outer cladding and an inner cladding, a space formed between the outer cladding and the inner cladding is used for being filled with an annular core block, and a vent hole is formed in one end face, connected with the outer cladding, of the inner cladding; a hollow hole channel is formed in the inner cladding, and a heat removing device is inserted into the hollow hole channel. Through the element design of the double jackets, the problem of matching of solid reactor core heat pipe insertion type heat exchange and fuel element structures is solved, a pellet material with high heat conductivity is cooperatively selected, additional arrangement of a base material is not needed, and a heat transfer path is reduced.