Abstract: Industrial technological innovation is the essence of innovation economics and evolutionary economics. Only when the evolutionary law of technological innovation is recognized, will it bring great fortune. This paper builds an evolutionary model of self–organization in technological innovation by referencing the species equation of biology and laser intensity equation of quantum mechanics, then analyzes the stability and bifurcation, mutation and gradient of this model, and reveals the mechanism and evolutionary process of self–organization from one state to another in technological innovation.