PURPOSE: A recycled aggregate manufacturing method using sewage sludge is provided to use sewage sludge as recycled aggregate by drying the sewage sludge and reduce transport costs without the use of separate fuel by using waste heat generated in a rice hull carbonization system of a rice total process field, thereby enabling the environment-friendly process and commercialization of sewage sludge economically. CONSTITUTION: A recycled aggregate manufacturing method using sewage sludge comprises: a rice hull carbonizing process which produces rice hull charcoal by injecting the rice hulls in a carbonization furnace (10) and thermal-decomposing the rice hulls with a high temperature; a smokeless process which supplies synthetic gas ejected in the carbonization furnace to a smokeless furnace (30) and burns completely the gas; a dry process which injects the dehydrated sewage sludge into a dryer (40) receiving hot air ejected in the smokeless furnace; and a sorting process which injects the dried sewage sludge to
