The invention discloses a coated pressure sensor based on a PDMS material and a preparation method thereof, and belongs to the technical field of flexible pressure sensors. The technical problem to besolved is to provide an improvement of a coated pressure sensor structure based on a PDMS material and a preparation method thereof. In order to solve the technical problem, the technical scheme as follows is adopted: the coated pressure sensor comprises a sponge composite framework serving as a three-dimensional porous frame, the surface of the three-dimensional porous structure of the sponge composite framework is coated with a PDMS material, and the sponge composite framework is also filled with a conductive nano material; electrodes are arranged on the two sides of the sponge composite framework respectively, and the electrodes are bonded to the surface of the sponge composite framework through PDMS films; and the electrodes are specifically conductive adhesive tapes coated with conductive silver paste on the surfaces. The method is used to manufacture a flexible tactile sensor.