Only the enterprises that introduce new technical innovation projects continually can enhance the core competitive capability, and the innovation motivation is the key factor to realize enterprise's sustainable innovation, hence it's important to study how to measure and evaluate enterprise's sustainable innovation motivation. Based on this, the paper design the model of enterprise's sustainable innovation motivation from the perspective of the main constituents projection method, and take Yunnan Baiyao Group Ltd, Lenovo Group Ltd and Huawei Co as cases to analyze, finally arrive at the conclusions and put forward the suggestions.