The present invention discloses a preparation process of a flexible temperature-
stress sensor, comprising the following steps: preparing a flexible substrate by
spin coating using a PDMS solution; preparing a MXene-CNTs stress
composite film; preparing a PEDOT:PSS-CNTs-
graphene thermosensitive
composite film; preparing a SiC film as a
dielectric layer; preparing an
electrode layer of an equivalent neural conductive
network structure; vertically laminating a flexible substrate, an
electrode layer, a stress
composite film, a
dielectric layer, a thermosensitive composite film, an
electrode layer, and a flexible substrate in a bottom-to-top order, wherein the lead of the upper electrode layer is placed in the X-axis direction, and the lead direction of the lower electrode layer is placed in the Y-axis direction for vertical lamination, to prepare a flexible temperature-
stress sensor. The flexible sensor prepared by the present invention takes into account multiple detection capabilities of temperature and stress, wherein
temperature sensing is reacted by the magnitude of the thermoelectric potential, and
stress sensing is reacted by the magnitude of the resistance, and the sensing mechanisms are different, which is convenient for temperature and stress decoupling, avoids
signal crosstalk, and improves the accuracy of measurement.