The posters have caricatures of West Bengal Chief Minister along with different captions aimed at taking a dig at Banerjee for different political developments in her state in the recent past.
Large numbers of such banners have been installed at major areas of Jantar Mantar road, Bang Bhawan (Hally Road) and Windsor Palace Circle Area.
'Didi, no one is going to prevent you from addressing people here', reads the caption of another poster.
Mamata Banerjee is in the national capital today to join the opposition protest in the city.
Along with Banerjee, Andhra Pradesh Chief Minister Chandrababu Naidu and Delhi Chief Minister Arvind Kejriwal are also expected to take part in the opposition protest.