Abstract: As the essential attribute of the socialist countries and the special circumstances of the Soviet Union,the Soviet procuratorial power is to achieve unity of indirect democracy and direct democracy,ultimately to achieve the socialist democracy.The "parliament & executive in one" constitutional system has determined that the Soviet regime needs to establish a special prosecution to protect the country’s laws’ uniform and correct implemented.The power restriction theory is in line with Marxist dialectics,and the central role of the Soviet prosecutorial power is to effectively constrain state power,thus preventing arbitrary and abuse of it.