The invention discloses a mechanical property test high-temperature heating furnace with a temperature gradient function. The mechanical property test high-temperature heating furnace comprises a high-temperature heating furnace body, a thermal insulation device, an annular sealing ring and the like, wherein the high-temperature heating furnace body is used for achieving the preset test temperature and precision, a specific temperature gradient field can be realized through the annular axisymmetric thermal insulation device designed based on a gradient thermal insulation design principle, andthe annular sealing ring ensures the accessibility and stability of the inner temperature of a cavity of the thermal insulation device. The mechanical property test high-temperature heating furnace has the advantages that the annular axisymmetric thermal insulation device adopts the gradient thermal insulation design principle, and works in cooperation with flowing cooling gas in the cavity, so that the stable temperature gradient field is formed inside the cavity of the thermal insulation device, and then mechanical property tests under different temperature gradient conditions are realized.