Oral argument, originally a construction of trial procedure, is a reaction to written trail. While in the construction of procedure, the trial mode of oral argument appears as a series of oral complaints and defenses and designated date of oral argument heard by the judges. The oral fashion can always make the principles of oral argument accomplish and become the mechanism of its efficient operation. Taken the trail mode of oral argument as the target, the civil trial procedure shall implement the principles implied in the mode of oral argument from content to form.