Аннотация:The article analyzes the regulatory legal acts of the national legislation of Kazakhstan and Russia, their bilateral treaties, and conventions. The provisions of these regulations regulate issues of international cooperation in the field of criminal justice with the participation of representatives of the legal community. Based on their analysis and taking into account the needs of practice, the proposals are formulated to further improve the legal basis for the participation of lawyers in criminal proceedings. These proposals are presented to improve the legal basis for the participation of lawyers in criminal proceedings carried out in the territories of border states, Kazakhstan and Russia.