This paper discusses the working mechanism and the design of basic norms involved in lawyers’ participation in handling law and litigation related petition cases；analyzes the existing problems existing in this mechanism，such as unclear legal basis，weak system guarantee，imperfect screening mechanism，and insufficient popularization of work publicity，etc. Based on this，it puts forward suggestions such as perfecting legislative regulations，improving operation mode，strengthening organizational guarantee and publicity guidance，etc.，so as to better play lawyers’ role in resolving heavy contradictions in diversified disputes and maintain social harmony and stability.