Abstract: As litigants are able to testify to relevant facts out of their personal experiences and memories about the case，they play a similar role in a law suit.However，litigant witnesses do not enjoy an equal position in suit to those of the third party，so there need to have a special set of procedures for litigant testifying in order that their testimony can function well.Such procedures should follow a basic pattern: when verifying proofs in court，the litigant witness should take an oath or make an affidavit as witnesses of the third party do，pledging to offer factual information relating to the case.Besides，they must also undergo inquiries by each party involved in the suit.

Key words: litigants, witness, witness of the third party, testifying procedures, factual information