To cultivate creative intellectuals, which can be achieved by innovation education, is the special task of universities and colleges in Knowledge-economy Times. And the cultivation of interest is an important part of the innovation education. The author puts forward some new ideas such as pre-inclination and interest plasticity which are necessary supplement for the theory of interest development; furthermore, according to the current situation of high education in China, the author points out that it is significant for the carry-out of innovation education in high schools to be aware of interest plasticity.