The invention relates to a pressure-responsive fragrant sustained-release microcapsule, and a preparation method and an application thereof. The microcapsule comprises a core material and a wall material coated outside the core material. The preparation method comprises the following steps: dispersing an essence-adsorbed porous silicon dioxide powder into deionized water under stirring, adding nanometer silicon dioxide, natural latex and a cross-linking agent I for cross-linking so as to prepare the pressure-responsive fragrant sustained-release microcapsule. The pressure-responsive fragrant sustained-release microcapsule is applied through the following steps: adding the natural latex into the prepared microcapsule, then adding a cross-linking agent II and the deionized water, carrying out uniform dispersing, injecting a dispersion into a mold, carrying out drying, cross-linking and cooling so as to prepare an elastic material, and coating an EVA hot melt adhesive onto two sides of the elastic material so as to prepare an elastic carpet. According to the invention, the preparation method is simple; raw materials are easily-available; and the essence release speed of the fragrant sustained-release microcapsule has a certain relationship with the pressure that the fragrant sustained-release microcapsule bears, so the release effect of an essence in the interior of the microcapsule is effectively improved; the usage amount of perfumes is saved; the service life of the carpet is prolonged; and significant application prospects are achieved.