The invention provides a flexible touch module. The flexible touch module comprises a touch sensor layer, a flexible polarizer layer and a PI cover plate which are sequentially arranged in a stacked mode. The touch sensor layer comprises a transparent PI layer, a first silver grid conductive pattern layer, a first protection layer, a second silver grid conductive pattern layer and a second protection layer. Meanwhile, the invention further discloses a preparation method of the flexible touch module. The flexible touch module provided by the invention is thin in thickness, foldable and capableof better adapting to the future flexible screen market.