Abstract: The application of template is good at knowledge re-usage and rapid design, and research on cooperative template aids to explore the partition, competition and concurrent principle in favor of reducing the information for transmitting. Constraint information is crucial content of cooperative template, with the extending application, constraint information becomes more complicated and various, it's hard to control and manage. Based on the features of constraint information in cooperative template, this paper discusses detailed signification and formalized description of visualization of constraint information, puts forward a research framework composed of harmonious constraints, constraints similarity and the techniques of constraint information visualization, based on the theory of constraints similarity, according to constraint harmonious model and visualization techniques, points out crucial steps such as constraint information mapping, dynamic track and so on, which gives an important direction to complicated system control and complicated constraints management.