Precise small blackbody radiation source and preparation method thereof

The invention provides a precise small blackbody radiation source and a preparation method thereof. The blackbody radiation source comprises a shell and a heating core arranged in the shell; a plurality of wiring terminals are arranged on the inner side of the top end of the shell; the heating core comprises a column base and a plurality of ceramic tubes; a heating wire is arranged in one of the ceramic tubes in a penetrating manner; one end of the heating wire penetrates out of the ceramic bead, then is uniformly wound on the outer sides of the plurality of ceramic tubes and finally penetrates out of the first wire outlet hole; and the other end of the heating wire directly penetrates out of the second wire outlet hole. According to the invention, unified physical interfaces and electrical interfaces are adopted; the temperature of the black body can be accurately controlled in cooperation with the temperature controller; a collimator and a diaphragm tube are matched to form an infrared simulator system, inf