In order to ensure the smooth progress of the communication process, people need to follow the principle of cooperation.But sometimes people in specific context, in order to cause a certain humorous effect, will also be deliberately violate the cooperative principle.Humor is a common form of verbal communication, as a special language phenomenon, playing an important role in verbal communication.At the same time, humor is a way to express feelings of uniquely human, which has various performance means.Cartoons , in view of the special groups---children, appropriately using humor, can make the characters in the cartoon lifelike, making children laugh after watching, which is also an important factor to make cartoons popular.Based on the cooperative principle of pragmatics, this paper takes the dialogue in the classic cartoon 'CrayonShin-Chan ' for example, analyzing the humorous effect caused by deliberately violating the cooperative principle.