The decision was to fire some 3,000 employees was made on Monday by the joint human resources and general purposes committee and the finance and development committee.
This follows the July 17 Supreme Court ruling that empowered employers to offload workers on notice.
Deputy mayor, Thomas Muzuva, ratified the decision.
In a statement, MDC-T provincial chair, Eric Murai, said they would not allow the sacking.
â€œThe MDC Harare Province wishes to make it categorically clear that it will not allow the MDC-dominated council to fire even a single employee in line with the recent Supreme Court ruling.
â€œThe party, through the province, has since directed the council not to engage in the needless retrenchment of employees in compliance with the court ruling,â€ said Murai.
He added: â€œIt is the MDC, a pro-workers party, that deployed these councillors to serve all ratepayers in the first place and we will not allow them to be complicit in the Zanu (PF) ploy to fight and fire workers on notice in an arbitrary and insensitive manner, without any packages or benefits.â€
Murai said only individual councillors in their capacities as chairpersons of council committees had taken part in resolving to fire the 3 000 workers.
â€œCertainly, the decision of a few individual councilors cannot be allowed to prevail on a momentous issue of such magnitude in the absence of the convening of a full council.
â€œIn light of this, the Harare City council will therefore not fire any workers and all stakeholders are hereby advised accordingly,â€ he said.