The invention discloses a usage of a pyracantha fortuneana fruit extract in preparation of health foods and medicines capable of improving visual sensitivity. The pyracantha fortuneana fruit extract is prepared by a method comprising the following steps: S1, carrying out purification; S2, carrying out tissue fragmentation; S3, carrying out decoction; S4, carrying out acidification treatment; S5, carrying out macroporous adsorption resin column chromatography purification; S6, carrying out ethanol extraction, namely adding ethanol so as to perform cold leaching, filtering the extract, and combining filtrates; and S7, carrying out vacuum decompressed concentration so as to obtain the pyracantha fortuneana fruit extract. The usage of the pyracantha fortuneana fruit extract has the following beneficial effects: contents of chemical compositions in the pyracantha fortuneana fruits used for preparing health foods and medicines, including red pigment, total phenolics, total flavonoids and soon, are controlled; and the prepared oral solid preparations and the like have the effects of improving visual sensitivity, preventing myopia, preventing hyperopia, preventing night blindness and so on. Scope of utilization of the pyracantha fortuneana fruits is broadened by the usage of the pyracantha fortuneana fruit extract in preparation of the health foods and the medicines capable of improving visual sensitivity, and thus, development and utilization values of the pyracantha fortuneana fruits are increased; moreover, the usage of the pyracantha fortuneana fruit extract has wide market prospects.