After more than ten years' exploration, scholars have not yet reached a consensus on the formation and evolution mechanism of technological innovation network. Therefore, this paper introduces fault theory into this field. In this paper, the patent application of China's electronic information industry is used as a sample to construct the interorganizational technology innovation network, and explore the mechanism of the split fault on the subgroup polarization in network embedding. The results show that the intensity of the binary relationship embedded in the tissue can cause the potential splitting of the whole network when the distribution of the different members is not uniform. But the split fault has no direct effect on the subgroup polarization. When the structure is embedded and the level of embedding is high, the effect of split fault on subgroup polarization is improved.