In view ofthe Internet ofthings secret information easv to leak in data transmission.a model of data secure transmission based on compressed sensing (CS) and digital watermarking technology in the Internet of things(IOT) is proposed in this paper For node coding end.we use the digital watermarking technology to embed secret information into the conventional data carrier And then.these data are rebuilt target transfer data bv the CS algorithm.and that is the observed signal After that.these signals are transmitted to the base station through the wireless channel After obtaining these observation signals.the decoder base station will reconstruct the data carrier which containing privacy information bv CS decoding algorithms Finally.we can obtain the private information by digital watermark extraction algorithm to achieve the secret transmission of the signal In this paper.by using two techniques of digital watermarking and compression sensing to hide secret information in the end of node encoding.it can efficiently increase the securitv of secret information At the same time.it can simplify the algorithm and reduce the energy consumption of node.It tums out that the program is still able to accuratelv reconstruct the original signal in the case of a certain packet loss rate.and the scheme reduces the energy consumption of sensor nodes significantly from the simulation results.