Shashwat Joshi joined the Samajwadi Party in the year 2002 and became the initial member, after that, active membership in the party in 2008. Since 2008, the Samajwadi Party has been a part of many movements against the BSP government of the opposition such as"Thu-Thu Divas", "Ghera Dalo- Dera Dalo" and Participated in the Kranti Rath Yatra along with Mr. Akhilesh Yadav and also participated in the Agra Cycle Rally from Noida, etc.

In 2011, the Youth Frontal Samajwadi Lohia Vahini of the Samajwadi Party was made the State Secretary, then after becoming the Socialist Charter in 2012, Lohia Vahini was made the National Secretary, in 2014, the Lok Sabha Sravasti ticket for the Member of Parliament was also tried, followed by the Samajwadi in 2016. Made National Secretary of Samajwadi Yuvjan Sabha.