The bridge, which was designed by Britain's Howarth Erskine, was China's first to be built entirely of steel. It was erected in 1907.
The journey will take advantage next week's high tides. "Putting the bridge back will be much more difficult than removing it from the site 10 months ago," said project director Mao Anji.
The barge with the bridge will sail down the Huangpu River from the dock in Pudong where repairs and restoration took place. It will wait at Suzhou Creek for the tide to reach its highest point later the same day.
It will stand on new concrete piles that are wider and deeper than the original wooden supports and is expected to have a safe lifespan of at least another 50 years.
Some 63,000 steel rivets have been replaced - about 40% of the total. Dozens of older craftsmen were recruited from remote factories outside Shanghai to make the rivets and hammer them into place. Making rivets that look like the originals required traditional skills that are dying out in China as elsewhere, said the project's engineers.
The removal also gave the chance to replace rusted and aging structural parts of the bridge.
