Flexible touch sensor with controllable sensitivity and preparation method thereof

The invention provides a flexible tactile sensor with controllable sensitivity and a preparation method thereof, the flexible tactile sensor comprises two sensing parts which are oppositely arranged up and down, and the sensing parts are longitudinally split and comprise flexible circuit boards, flexible insulating layers and sensing layers which are stacked in sequence; the sensing layer comprises a plurality of substrate areas and sensing function areas which are distributed in an array or staggered mode, the substrate areas are made of non-conductive hydrogel, the sensing function areas are made of elastic conductive hydrogel, one ends of the sensing function areas penetrate through the flexible insulating layer to be attached to the flexible circuit board, and the other ends of the sensing function areas are protrusions protruding out of the sensing layer. The plurality of sensing functional areas of the two sensing parts are arranged in a one-to-one up-and-down correspondence mode and abut against each o