Legal documents has been recorded truly objectively as flexible law characters carrier, placing on file for investigation and prosecution, has charged , has been tried, enforce the law waiting for legal action to use personal influence all the time. It is embodying because such a judiciary job has been related to collective rights and interests of country and civil one's immediate or vital interests directly , legal documents language is high , more peculiar than general official document term call for law dignity and justice, it applies to terms , sentential express, language applies, language style, paragraph structure aspect has oneself distinctive norm , the function is come true further , the rotten phenomenon adjudging sepsis and the judiciary will may be prevented from by effective field if these are standard. Therefore needing to be familiar with law not only as a lawyer,want norm hitting the target being elaborate about language in the process studying and making legal documents's, to improve expressing an ability in written form too.