Introduction. The article is dedicated to actual problem of analyze of purposes and principals of political parties activity in sphere of participation in government. Purpos. Main point of article is to analyze juridical purposes of political parties activity and basic principals of political parties activity in Russia and to analyze of correlation purposes and principals. Results. The author analyzed the Russian legislation on the subject of fixing the main objectives and principles of political parties activity, analyzed the statutes of political parties. The author draws a conclusion about the primacy of the principles, as well as about the necessity of insertion in the list of principles of political parties activity of the principle of priority of interests of voters. Conclusion. Author discovers roots about importance of analyze juridical purposes of political parties activity and basic principals of political parties activity in Russia. Author concludes about the need to bring them in line with each other to the exclusion of any disputes. Author underlines the wrong idea about that the main purpose of political parties always is the conquest of power. The author arguments in favor of the fact that the conquest of power is not and should not be an end in itself the activities of political parties. It is emphasized the importance of the relationship of the purposes and principles of activity of political parties. The author offers to amend the existing legislation on political parties one more principle – principle of priority of interests of voters.