The purpose of the current research was to design a model of corporate innovation with an emphasis on informal financing. The current mixed method research, in terms of purpose and data collection method, was applied and descriptive-survey, respectfully. In the first phase, Strauss and Corbin's qualitative grounded theory method was used to form the model, and descriptive-analytical quantitative method and correlation type based on structural equation model were used to test the model. The mixed research method was sequential exploratory; That is, first it was qualitative and then quantitative. In the first part (qualitative part), to conduct field interviews, the statistical population of the research was the experts, who were familiar with the subject, and selected based on snowball technique for qualitative interviews on the subject of the study (15 interviews with 15 experts and continued until theoretical saturation) . In the second (quantitative) part, after collecting the information from the qualitative research, a questionnaire was created and this questionnaire (110 items) was distributed among all experts in the fields of economics, banking and innovation in Golestan province (65 people). According to the t-value (more than 2.58), it was found that at the level of 0.99, the informal financing model is confirmed and all the relationships in the research model were confirmed. Creating databases regarding financing capacities in the corporate structure, developing a legal framework and structure in the field of financing in the corporate field, creating steering committees in companies to develop corporate innovation, attracting and cultivating financial and economic specialists in companies are recommended in the field of facilities and financial resources.