2018 was a general election year for Latin American countries，with elections in major Latin American countries such as Cuba，Venezuela，Mexico，Colombia and Brazil，and while there have been assassinations of candidates in some countries such as Mexico and Brazil，but in general，elections in Latin American countries have been conducted within a constitutional framework，The change of government has also maintained the basic political stability. At present，left-wing parties are still in power in small and medium-sized countries such as Venezuela，Ecuador，Uruguay，Bolivia and Nicaragua，and Mexico，which the left came to power in December 2018，has summed up the Latin American political landscape as a new situation of “Left and right co-governance”，rather than “left back and right advance”. In the wake of the election year，policies in many Latin American countries will face adjustment，especially in countries where the rotation of party-shaped parties is more pronounced，but neither the left nor the right to govern will change the basic direction of the country’s political development. In the 2019，a number of countries still will held general elections，we can study the political changes in those countries by focusing on the elections，including the contrast and changes of various political forces and trends，and to observe and study the policy changes of countries in the era of “left-right co-governance”.