As a situational simulation evaluation techniques，leaderless group discussion has been widely applied in personnel selection and quality test. However， during implementation process as well as the indicators designing， influences from appraiser's level of expertise and evaluation techniques， can easily lead to low recognition on evaluation indicators and job requirement， as well as unclear understanding of assessment goals and procedures by judges， which can impact the assessment effect. An effective way to improve this assessment technique is to strengthen implementation steps by integrating conventional assessment program with practical experience， and refining assessment indicators as well.