The present disclosure discloses a method for transmitting data based on a Time Division Duplexing (TDD) standard, the method includes: setting a control parameter for analyzing and processing IP packet; receiving the IP packet from an IP layer and storing the IP packet into a receiving buffer according to the control parameter; scanning the IP packet in the receiving buffer, analyzing packet header information of the IP packet, adjusting a sending order of the IP packet according to the control parameter and sending the IP packet to a sending buffer according to the sending order; and sending the IP packet in the sending buffer to a Packet Data Convergence Protocol (PDCP) entity according to the sending order. The present disclosure further discloses a method for transmitting data based on a TDD standard.