The human society has been subject to two kinds of law: natural law and social law.

She is the product of nature, whose law is her belief, but she is obliged to offend social law, which persecutes and victimizes her.

Since the establishment of man-ruled position in patriarchic society, female behavior criterion came to be regulated by the mode of collective unconsciousness, being an ineradicable rule of social reality.

Stressed on that important significance to objective and fair about evaluation ,which are sociology principle and internal or external supervision mechanism.

The destruction to traditional social rules lies in reconstruction of the non-linear rules.

The rationality of moral education existence lies in instrumentality meaning as social rules and ideologies of human s life,and lies in value as the ultimate consideration of the meaning of human existence.

Hart interpret the concept of law by the theory of social rules, thus rules are different from customs; and law is the combination of primary rules and secondary rules.

Based on the theoretical research achievements,the paper holds that the deep motivation of code switching is governed by social rules and personal consciousness.

This paper attempts to analyze how three different types of codes: the personal code, group code and social code affect the hero, Jim in Lord Jim, drawing the conclusion that Jim s tragedy arises from his elevation of personal code above group code and social code.