Fuente: Wipo "IOT" The invention discloses a multi-source heterogeneous data fusion method based on the Internet of Things, and the method comprises the steps that a DTS collects the data of a plurality of IoT devices,wherein the data comprises the type identifiers of different IoT devices; the DTS performs data combination on the IoT device data, and defines the data combination as a source data set; the DTS performs primary fission on part of IoT data in a source data set based on the type identifiers of the IoTs and the encryption levels corresponding to the type identifiers, and inserts the fission IoT datainto the source data set to form a primary fission data set; the DTS performs secondary fission on part of IoT data in the primary fission data set, and inserts the fission IoT data into the primaryfission data set according to a random insertion algorithm to form a secondary fission data set; the DTS performs tertiary fission on part of IoT data in the secondary fission data set, encrypts the fission IoT data according to an asymmetric encryption algorithm, and inserts the fission IoT data into the secondary fission data set according to a random insertion algorithm to form a tertiary fission data set; and the DTS sends the tertiary fission data set to the core layer.