The election will be the first without Robert Mugabe in power since the country won independence from Britain in 1980.
Mnangagwa took over in November 2017 after Mugabe, now 94, was forced out of office when the military briefly took over.
Previous elections in Zimbabwe have been marred by electoral fraud, intimidation and violence, including the killing of scores of opposition supporters in 2008.
“I appeal to my fellow candidates to humbly go out and canvas for the votes,” Mnangagwa told thousands of provincial party representatives at the campaign launch in Harare.
“You can’t force people to vote for you. We can persuade people to vote for us…. Victory for the revolutionary party is certain.”
Mnangagwa, 75, has repeatedly pledged to hold free and fair elections as he seeks to mend international relations, but he has also been accused of involvement in Zanu-PF’s past record of election violence.
He is a veteran party loyalist who served as Mugabe’s deputy until he was sacked shortly before Mugabe was ousted.
Mnangagwa and the Zanu-PF will take on the main opposition Movement for Democratic Change (MDC) party, now led by Nelson Chamisa following the death of Morgan Tsvangirai in February.
The Zanu-PF manifesto vows to repair the shattered economy and take annual GDP growth to 6%, bring in $5bn foreign investment a year and build 1.5 million new houses.
Massive banners at the venue proclaimed Mnangagwa as “the leader who cares for all his people”.
The party handed out all-terrain vehicles to each candidate in all 210 constituencies as well as party regalia of caps, scarfs and shirts decorated with Mnangagwa’s portrait and signature.
Takavafira Zhou, a political scientist at Masvingo State University said Zanu-PF offered little that was new for voters despite the fall of Mugabe.
“You cannot expect solutions from the very people who created the problems,” he said.Post published in: Business