The invention relates to a manufacturing method of a temperature sensor. The manufacturing method comprises the following steps of using graphene oxide and polypyrrole to synthesize composite grapheneoxide, wherein the composite graphene oxide serves as a core chip part of the sensor; then synthesizing polydimethylsiloxane and methylene acrylamide into a high-molecular polymer through a physicaland chemical crosslinking method, wherein the high-molecular polymer serves as an outer-layer insulation part of the sensor; and finally manufacturing the graphene oxide composite polymer temperaturesensor by embedding a copper wire. The temperature sensor provided by the invention has the advantages of simple and convenient manufacturing, simple structure, high sensitivity, light weight, good biocompatibility and the like; and the most important advantage is that the temperature can be measured in a suspension mode, so that direct contact with a measured object is not needed. The temperaturesensor has a very good application prospect in the fields of animal temperature measurement, human body temperature measurement, environment temperature measurement and the like.