Disclosed in an embodiment of the present invention are a control method for a duplicated data transmission function, a terminal and a computer storage medium, the method comprising a terminal determining a bit in a received bit map according to configured indication information corresponding to a data radio bearer (DRB) and/or a preset rule, the bit map being one from among two received bit maps, the terminal determining a duplicate data transmission function of the DRB to be activated/deactivated on the basis of the indication of the bit.