The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate after a 4G communication system such as LTE. The present disclosure provides a method for supporting repetitive uplink data transmission by a base station in a mobile communication system which operates on a time division duplex (TDD) cell including at least one subframe for uplink transmission and at least one subframe for downlink transmission, the method comprising the steps of: repeatedly transmitting uplink data scheduling information in a downlink subframe where an uplink hybrid automatic repeat request (HARQ) process is defined among the subframes; and repeatedly receiving uplink data from an uplink subframe according to the HARQ transmission timing of an HARQ process defined in a downlink subframe where the repetitive transmission of the scheduling information has been completed.