Start-ups are often subject to external financing constraints, this phenomenon is especially serious for growth technology start-ups enterprises. Therefore, the credit evaluation index system and model building of growth-type technology start-ups are necessary. Based on the dynamic financial data, this paper took the growth and innovation capability of enterprises as important indicators of the evaluation, and used logistic regression to present a growth technology start-ups enterprise credit evaluation model and method to dynamically evaluate the credit situation. Comparing and testing by the model, it proved the higher accuracy of the evaluation.