Abstract: The relationship between organization slack and enterprise innovation is controversial in academia. One of the important reasons is the literature was short of classified discussion on slack and neglected the influence of environmental factor. The result of empirical research show that the relationship between absorbed slack and enterprise innovation is U-shaped .This means when the slack in a low-level, absorbed slack is adverse to and promote the enterprise innovation when the slack in a high-level. The environmental uncertainty will strengthen the relationship between innovation projects and absorbed slack when it is increased, but the environmental uncertainty cannot moderate the relationship between innovative product and absorbed slack.