Provided are a data retransmission indication and processing method and device. The data retransmission indication method includes: a first network element sends a retransmission indication message to a retransmission network element, the retransmission indication message being used to instruct the retransmission network element to retransmit segment data of a Packet Data Convergence Protocol (PDCP) Protocol Data Unit (PDU), which fails to transmit by the first network element, to a terminal.