Bird nests were searched by checking potentially suitable habitat from March to July in 2010~2012 at Nonggang National Nature Reserve which sits in the limestone Area of Southwestern Guangxi. More than 40 species of birds' nests were located and most of them were found during April and May. This paper provides the information on breeding period, nest characteristics, clutch size and egg morphology for 18 bird species which have been poorly known. These information would useful for the future studies on the bird in limestone area.