This study is to discuss the definition of stylization of illustration in packaging design through literature reviews; and analyze the packaging illustration of the grocery products through marketing survey base on the random collection of packaging illustration. The results of the survey can be analyzed to provide reference materials to packaging designers and visual perceptive research workers. According to the sample-taking observation and cross-analysis, we have found the stylization and characteristics of some packaging illustration have profound function of communication and there are several types of illustration that designers used regularly. The results can provoke two dimensions of design thinking: the principles of stylization presentation and the understanding of the trend of illustration applied to packaging design.