A manufacturing apparatus for activated carbon filters has a non-woven cloth machine, a rolling module, a sprayer and a hot-pressing cylinder. The non-woven cloth machine is used to manufacture a body of non-woven cloth and has a processing segment. The rolling module is mounted at the processing segment to heat and melt the body of non-woven cloth. The sprayer is mounted above the rolling module to spray activated carbon powder on the body of non-woven cloth. The hot-pressing cylinder is mounted at the processing segment to heat and press the activated carbon powder with the body of non-woven cloth. The activated carbon powder can be securely attached to the body of non-woven cloth by the manufacturing apparatus to provide a preferred quality of the activated carbon filters and to reduce the cost of manufacturing the activated carbon filters.