The phenomenon of diversified terminal structures is common in the Industrial Internet of Things (IIoT), and the information transmission methods between the terminals are more complicated. The wireless network transmission and the security of wireless data communication between various intelligent devices are a major challenge facing the IIoT. Aiming at the problem that the existing single-path communication method of the IIoT intelligent production line system cannot guarantee the confidentiality, integrity and authenticity of sensitive information transmission effectively, we establish a redundant collaboration secure communication scheme (TS-RCSCS) for IIoT intelligent production line system in this paper. This scheme constructs a redundant-synergy secure communication model based on threshold signature mechanism and proposes a redundant-synergy transmission method based on multiple auxiliary paths. This method can prevent state information transmission failure effectively caused by the failure of wireless communication nodes in IIoT intelligent production line system, which could reduce the probability of information packets being intercepted by malicious nodes. In addition, in view of the special situation that redundant-synergy secure communication model fails periodically, this scheme further proposes a method for predicting the communication missing data of intelligent production line system. This method can predict the missing communication information of continuous period effectively, which meets the integrity requirements of communication information for IIoT intelligent production line system. The test verification conclusion shows that the TS-RCSCS scheme can obtain higher communication accuracy and higher fitting prediction value in the IIoT environment. The conclusion further shows that the scheme is suitable for the wireless communication process between intelligent devices and intelligent terminals in the IIoT environment, and it can improve the security and integrity of data communication effectively.