▎ 摘　　要

NOVELTY - Preparing a flexible fabric-based strain sensor involves pre-treating the elastic fabric to obtain the pre-treated elastic fabric. The dopamine or its derivatives are used to modify the pretreated elastic fabric. The elastic fabric modified by dopamine or its derivatives is immersed in a dispersion of graphene or its derivatives, dried, reduced, washed, and dried to obtain an elastic fabric covering the inner conductive structure. The elastic fabric covering the inner conductive structure is immersed in a mixed dispersion of silver nitrate and carbon nanotubes or derivatives, dried, reduced, washed, and dried to obtain an elastic fabric covering the inner and outer conductive structures, that is, a flexible fabric-based strain sensor. USE - Method for preparing a flexible fabric-based strain sensor used for wearable devices, smart health monitoring, flexible robots, and energy storage (claimed). ADVANTAGE - The method improves the problems of poor dispersion and easy agglomeration of carbon-based materials, solves the problem of the bonding firmness between the conductive material and the substrate in the sensor, and solves the problems of the bottom sensitivity and wide strain of the existing flexible strain sensor.