An uplink transmission method based on a licensed-assisted access LAA system, comprising: for a transmission burst transmitted on an unlicensed carrier, reserving at least one SC-FDMA symbol in a subframe of an uplink transmission burst corresponding to the transmission burst, wherein in the reserved at least one SC-FDMA symbol, user equipment accesses a channel by using a listen-before-talk, LBT, access mechanism; characterized in that : if a channel access operation is performed before a first subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at a start position of a first subframe of the uplink transmission burst; if no uplink data is transmitted after a last subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at an end position of a last subframe of the uplink transmission burst; and the method further comprises: configuring the reserved at least one SC-FDMA symbol by using higher layer configuration signaling and/or a physical downlink control channel, wherein at least one of the following options is specifically comprised: a quantity of reserved SC-FDMA symbols, a position of the reserved SC-FDMA symbol in a subframe, a type of the reserved SC-FDMA symbol, and a period and an offset of the reserved SC-FDMA symbol. for a transmission burst transmitted on an unlicensed carrier, reserving at least one SC-FDMA symbol in a subframe of an uplink transmission burst corresponding to the transmission burst, wherein in the reserved at least one SC-FDMA symbol, user equipment accesses a channel by using a listen-before-talk, LBT, access mechanism; characterized in that : if a channel access operation is performed before a first subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at a start position of a first subframe of the uplink transmission burst; if no uplink data is transmitted after a last subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at an end position of a last subframe of the uplink transmission burst; and the method further comprises: configuring the reserved at least one SC-FDMA symbol by using higher layer configuration signaling and/or a physical downlink control channel, wherein at least one of the following options is specifically comprised: a quantity of reserved SC-FDMA symbols, a position of the reserved SC-FDMA symbol in a subframe, a type of the reserved SC-FDMA symbol, and a period and an offset of the reserved SC-FDMA symbol. if a channel access operation is performed before a first subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at a start position of a first subframe of the uplink transmission burst; if no uplink data is transmitted after a last subframe of the uplink transmission burst, the reserved at least one SC-FDMA symbol does not comprise: a symbol at an end position of a last subframe of the uplink transmission burst; and the method further comprises: configuring the reserved at least one SC-FDMA symbol by using higher layer configuration signaling and/or a physical downlink control channel, wherein at least one of the following options is specifically comprised: a quantity of reserved SC-FDMA symbols, a position of the reserved SC-FDMA symbol in a subframe, a type of the reserved SC-FDMA symbol, and a period and an offset of the reserved SC-FDMA symbol. <EOS>