Boodhoo became involved with
socio-cultural movement Siva Shivir in 1968 and he campaigned against the consumption of alcohol and cigarettes in Mauritian villages. In 1976 he was approached by Sir
Seewoosagur Ramgoolam to join the
Labour Party (Mauritius) (PTr). He was elected to the Legislative Assembly or National Assembly of Mauritius at the
1976 General Elections as part of the
Independence Party (Mauritius) coalition government made up of Labour and CAM which allianced with rival PMSD after the elections.He represented Constituency No. 13 (Riviere des Anguilles and Souillac) where the other 2 elected members were his rivals Suresh Poonith and Swaley Kasenally of the MMM. From 1976 to 1979 Boodhoo served as a member of Legislative Assembly (MLA) under the Labour-CAM-PMSD coalition but he criticized various aspects of the ruling government. He was especially critical of the Minister of Finance
Sir Veerasamy Ringadoo's budget, leading to nationwide strikes in June 1979. Boodhoo also instigated a commission of enquiry in 1978 which led to the resignation of two sitting ministers Lutchmeeparsad Badry (Social Security) and Gyandeo Dabee (Cooperatives) in May 1979. Eventually Harish Boodhoo and two other Labour parliamentarians (Radha Gungoosingh and Rohit Beedassy) who supported him were dismissed from the Labour Party in late 1979. In December 1979 he formed a new party
Parti Socialiste Mauricien (
PSM) and was joined by other disgruntled members of the ruling Labour Party. In 1982 he formed a coalition with
Mouvement Militant Mauricien (MMM) which won the
1982 General Elections. Harish Boodhoo became Deputy Prime Minister in the MMM-PSM government led by Prime Minister
Aneerood Jugnauth after his election in Constituency No.13. ahead of his running mates Vishnu Lutchmeenaraidoo and Swaley Kasenally. Whilst still in power there was disagreement within the ruling coalition of MMM-PSM which led to the departure of Aneerood Jugnauth and other elected members from MMM as he formed a new party MSM. At the same time Harish Boodhoo dissolved his party PSM so that all PSM parliamentarians could merge into the new party MSM in order to stay in power whilst distancing themselves from Paul Bérenger and his party MMM. He was Chief Whip until the
1983 General Elections. At the August 1983 elections Harish Boodhoo was elected under the MSM banner (part of the victorious MSM-Labour-PMSD coalition) at Constituency No. 13 (Riviere des Anguilles and Souillac), behind his running mates
Vishnu Lutchmeenaraidoo and Ambah Chinien. However he was dismissed from the MSM in 1986 and Boodhoo did not take part in the 1987 General Elections. At the September 1991 general elections Harish Boodhoo stood as candidate of the Labour-PMSD coalition in Constituency No.12 (Mahébourg Plaine Magnien). But he was defeated there as elected members in that constituency were Vasant Bunwaree (Labour-PMSD), Ivan Collendavelloo (MSM-MMM) and Mookhesswur Choonee (MSM-MMM). In 1999 he relaunched the defunct party
All Mauritius Hindu Congress (AMHC) which had originally been active from 1965 to 1968. ==Contributions and legacy==