This analytical paper has investigated the impact of poverty on child literacy at compulsory school going age at poorest level of the backward KBK+ region of rural Odisha (one of the poorest region of the India). This paper has been prepared using unit level data of NSS (National Sample Survey).The entire population of KBK+ has been distributed into five pentile classes based on the monthly percapita expenditure of each household. The analysis has reached at the lowest pentile class of KBK+ and prepared a comparative picture on child illiteracy. It has been concluded that all the planning and policy for compulsory child education are significantly successful in this backward region of the country but the success is not significant at the poorest level of the region.