A data packaging method applied in a communication device is disclosed The method includes: transmitting a plurality of first data packets including a plurality of first data contents; storing the plurality of first data contents; obtaining allocated resources for a second data packet; inserting a second data content into the second data packet; determining whether any resources remain in the second data packet after the second data content is inserted into the second data packet; selecting a portion among the plurality of first data contents in response to any resources remaining in the second data packet after the second data content is inserted into the second data packet; inserting the selected portion into the second data packet; and transmitting the second data packet including the second data content and the selected portion; wherein the plurality of first data packets are transmitted previous to the second data packet.