A two-week waterfront picket line at Melbourne's Webb Dock, which has been blockading the gates to a major container terminal and holding up delivery of millions of dollars of cargo, has been called off.

Unionists and their supporters have maintained an around-the-clock presence outside Victoria International Container Terminal (VICT), preventing trucks from accessing more than 1000 stranded shipping containers carrying products including Christmas retail goods, fresh food and medicine, since the start of December.

Union members from across Melbourne marched on Webb Dock on Friday. Credit:AAP

The picket line was formed in response to the axing of a casual wharf employee who had been leading a union campaign in the workplace.

The company, VICT, said the man had been identified as ineligible for a security clearance required to work at the docks, while the union believed he had been targeted as part of a "union-busting" strategy.