The desire of governments to establish a democratic system, even in the form of the word "republic", makes public participation in the election process inevitable. On the other hand, the increasing indifference of nations towards determining their own destiny in the whole world has made governments face a serious challenge. Therefore, most of the politicians are determined to create motivation among the general public in order to participate in the elections. Political marketing is one of the concepts that have come to the aid of political activists by providing tools. Political participation for the government has special practical benefits, the lack of which harms the political system and its long-term goals, and therefore it is necessary to be noted This research is devoted to investigating the relationship between social trust and participation in elections and political marketing. The statistical population of the current research is the citizens of Kermanshah city over 18 years of age, of which 384 people have been investigated as a sample. Fundamental (0.39), informal trust (0.32), institutional trust (0.42) and generalized trust (0.34) have a positive, direct and meaningful relationship with citizens' political participation and marketing. Therefore, all research hypotheses are confirmed. The results of the structural equation model (Smart PLS) also showed that the total effect of the independent variable of social trust on citizens' participation and political marketing is 0.53.