Digital transformation of industrial innovation ecosystem is faced with the governance predicament caused by high complexity and uncertainty. The emerging tentative governance theory provides a new perspective to promote digital transformation. It constructed a tentative governance model for the digital transformation of the industrial innovation ecosystem， including the following three core elements： multi-center governance structure composed of diversified agents； a governance mechanism that integrates policies， contracts， and relationships； governance niche combination composed of resource allocation， market formation， search guide and legitimacy. Meanwhile，these elements should be integrated into a system through a progressive governance process. A case study on the bearing industry in Xinchang city， Zhejiang Province， further illustrated the constructed theoretical model. The research results have positive theoretical and practical implications for the digital transformation of innovation development and its governance.