0803 GMT January 20, 2018
Qatar's defense ministry announced the arrival of the fresh reinforcement at the Al Ubeid airbase in the capital, Doha, aljazeera.com reported.
The group, including soldiers from the Turkish Joint Forced Command, will join Turkish troops already based at the Tariq bin Ziyad military base in southern Doha.
The new arrivals will hold training with Qatar's armed forces to boost joint military capabilities.
The first Turkish troop deployment to Qatar was in 2015.
Turkey set up a military camp in Qatar, its first such installation in the Middle East, as part of an agreement signed in 2014.
The base has a capacity to accommodate up to 5,000 troops.
Turkey plans to gradually increase the number of its forces in Qatar to 3,000, according to the agreement between them, and keep a brigade in the Persian Gulf country.
In June, Turkey's parliament fast-tracked the approval of a separate April 2016 agreement with Qatar on the implementation of troops' deployment to the Turkish military base.
It also approved a December 2015 agreement that allows the Turkish military to train Qatari security forces.
Turkish President Recep Tayyip Erdogan has been a major supporter of Doha since Saudi Arabia, Bahrain, the United Arab Emirates (UAE) and Egypt cut diplomatic and trade ties with Qatar on June 5.
The four Arab countries had accused Doha of supporting "terrorism" and fostering ties with Iran. Qatar denies the accusations.
Ankara has also been trying to mediate between the sides to find a solution to the crisis.
In a show of solidarity, Turkey has also sent cargo ships and hundreds of planes loaded with food to help Qatar offset the blockade.
The closure of the Turkish base was one of 13 demands by the Saudi-led group of countries in order to lift their embargo on Qatar.