The establishment and development of democratic politics in ancient Greece included Solon's reform, peisistratus's establishment of autocratic politics, Cristini's reform, Ephialtes's reform and Perikles's reform. Generally speaking, the democratic political system of slave owners in Athens, ancient Greece was formed during the disintegration of primitive society and the formation of slavery. The product of the struggle between gentry and civilians and the development of slavery economy. It is necessary to adjust the interest relationship between different classes in the citizen collective. (This is an introduction) 1. Solon reform. As early as the end of the 7th century BC, the contradiction between gentry and civilians in Athens had developed to a very acute degree. In 594 BC, Solon, the arbitrator elected by both sides, reformed. Abolished debt slavery. 2. peisistratus established tyrant politics: the tyrant rule of peisistratus and his descendants objectively attacked the clan aristocracy, improved the economic status of small farmers as citizens, and promoted the economic and cultural development of Athens. 3. Cristini's Reform: At the end of 6th century BC, he ruled through anti-tyrant politics. In 509 BC, the Cristini Reform replaced the consanguineous organization as the administrative unit of the country. It weakened the influence of gentry and nobles in all aspects and promoted the development of democracy in Athens. 4. Ephialtes Reform and Perikles Reform: He was the chief general of Athens in the middle and late 5th century BC. The victory of the Persian war greatly promoted the development of slave ownership economy in Athens, and caused the change of power contrast between different classes of Athenian citizens. This led to reforms in Ephialtes and Pericles. During the reign of Pericles, Athens reached its peak in economy, politics and culture, and became the main cultural center to dominate the country and control the situation in the Greek world. 5. In 338 BC, Alexander of Macedonia conquered Greece, and the Athenian city-state democracy declined.