The invention belongs to the technical field of the heterocyclic compound and specifically relates to a heterocyclic compound which contains a five-link ring and two nitrogen atoms serving as heterocyclic atoms and is condensed with a phenanthrene ring, wherein the heterocyclic ring is not hydrogenated. The invention provides a 2H-phenanthro[9,10-c] pyrazol compound; and the process for preparing the compound comprises the following steps of: adding isoflavone to a solvent, carrying out condensation reaction with 80% hydrazine hydrate to generate the intermediate product 3,4-diaryl pyr-1H-azol compound; then diluting the intermediate product by using a solvent and distilled water, and closing the ring through illumination and dehydration by means of ultraviolet radiation, thereby obtaining the mixture of the compound provided by the invention and unreacted materials; recovering the solvent through reduced pressure distillation after reaction, and purifying the compound through column chromatography, thereby obtaining the pure compound provided by the invention. The compound provided by the invention is a novel photoluminescence material which can be printed on paper into various anti-fake labels for preventing alteration and faking; or, the compound can be used as a plastic package on a stainless steel disc as a road sign indicator lamp at night.