Child labour refers to the employment of children in any work. in 2011 national census of India found the total number of child labour, aged 5–14, to be at 4.35 million and the total child population to be 259.64 million in that age group.child labour is often defined as work that deprives children of their childhood, their potential and their dignity, and that is harmful to physical and mental development. it is mentally, physically, socially or morally dangerous and harmful to children.interferes with their schooling by depriving them of the opportunity to attend school,obliging them to leave school prematurely or requiring them to attempt to combine school attendance with excessively long and heavy work and this is mainly found in india and south africa.