A method for information transmission, characterized by comprising: determining, by a network device, a first time-domain resource available on a first carrier, wherein the first time-domain resource is in a first downlink transmission burst, and the first carrier is an unlicensed carrier, after successful channel detection by the network device; and sending, by the network device, first information to a terminal device through the first time-domain resource on the first carrier, wherein the first information is used to indicate that time-domain resource information of a first transmission burst needs to be determined according to a first subcarrier spacing, wherein the time-domain resource information comprises at least one of: an end of a corresponding transmission burst; or a channel occupancy duration of a corresponding transmission burst, wherein the first information is further used to indicate time-domain resource information of a third transmission burst according to a second subcarrier spacing, wherein the third transmission burst comprises at least one of: a fourth downlink transmission burst on the first carrier; a fourth uplink transmission burst on the first carrier; a fifth downlink transmission burst on a second carrier; or, a fifth uplink transmission burst on the second carrier, and wherein a frequency-domain resource corresponding to the third transmission burst does not overlap with the frequency-domain resource corresponding to the first transmission burst. determining, by a network device, a first time-domain resource available on a first carrier, wherein the first time-domain resource is in a first downlink transmission burst, and the first carrier is an unlicensed carrier, after successful channel detection by the network device; and sending, by the network device, first information to a terminal device through the first time-domain resource on the first carrier, wherein the first information is used to indicate that time-domain resource information of a first transmission burst needs to be determined according to a first subcarrier spacing, wherein the time-domain resource information comprises at least one of: an end of a corresponding transmission burst; or a channel occupancy duration of a corresponding transmission burst, wherein the first information is further used to indicate time-domain resource information of a third transmission burst according to a second subcarrier spacing, wherein the third transmission burst comprises at least one of: a fourth downlink transmission burst on the first carrier; a fourth uplink transmission burst on the first carrier; a fifth downlink transmission burst on a second carrier; or, a fifth uplink transmission burst on the second carrier, and wherein a frequency-domain resource corresponding to the third transmission burst does not overlap with the frequency-domain resource corresponding to the first transmission burst. an end of a corresponding transmission burst; or a channel occupancy duration of a corresponding transmission burst, wherein the first information is further used to indicate time-domain resource information of a third transmission burst according to a second subcarrier spacing, wherein the third transmission burst comprises at least one of: a fourth downlink transmission burst on the first carrier; a fourth uplink transmission burst on the first carrier; a fifth downlink transmission burst on a second carrier; or, a fifth uplink transmission burst on the second carrier, and wherein a frequency-domain resource corresponding to the third transmission burst does not overlap with the frequency-domain resource corresponding to the first transmission burst. a fourth downlink transmission burst on the first carrier; a fourth uplink transmission burst on the first carrier; a fifth downlink transmission burst on a second carrier; or, a fifth uplink transmission burst on the second carrier, and wherein a frequency-domain resource corresponding to the third transmission burst does not overlap with the frequency-domain resource corresponding to the first transmission burst.