A method for transmitting feedback information, comprising receiving, by terminal equipment, first downlink data in downlink data sent by network equipment through an unlicensed carrier, wherein the downlink data is sent by the network equipment by using at least one time-domain resource set, each of the at least one time-domain resource set comprises one or more continuous time-domain resource units, and the first downlink data is transmitted in a first time-domain resource unit in a first time-domain resource set in the at least one time-domain resource set; determining, by the terminal equipment, a second time-domain resource unit according to a location of the first time-domain resource unit in the first time-domain resource set; and transmitting, by the terminal equipment, feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier, wherein the first time-domain resource set comprises Q time-domain resource units, wherein Q≥T, T is a positive integer, and a value of T is determined according to a system processing delay, and transmitting, by the terminal equipment, the feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier comprises: transmitting, by the terminal equipment, C×L-bit feedback information to the network equipment in the second time-domain resource unit through the unlicensed carrier, the feedback information for the first downlink data belonging to the C×L-bit feedback information, wherein C is a maximum feedback information amount corresponding to downlink data transmitted in a time-domain resource unit, L is a positive integer and L≥Q; wherein transmitting, by the terminal equipment, the feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier further comprises: determining, by the terminal equipment, a first bit for transmitting the feedback information in the second time-domain resource unit through the unlicensed carrier according to the location of the first time-domain resource unit in the first time-domain resource set; and bearing, by the terminal equipment, the feedback information for the first downlink data in the first bit. receiving, by terminal equipment, first downlink data in downlink data sent by network equipment through an unlicensed carrier, wherein the downlink data is sent by the network equipment by using at least one time-domain resource set, each of the at least one time-domain resource set comprises one or more continuous time-domain resource units, and the first downlink data is transmitted in a first time-domain resource unit in a first time-domain resource set in the at least one time-domain resource set; determining, by the terminal equipment, a second time-domain resource unit according to a location of the first time-domain resource unit in the first time-domain resource set; and transmitting, by the terminal equipment, feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier, wherein the first time-domain resource set comprises Q time-domain resource units, wherein Q≥T, T is a positive integer, and a value of T is determined according to a system processing delay, and transmitting, by the terminal equipment, the feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier comprises: transmitting, by the terminal equipment, C×L-bit feedback information to the network equipment in the second time-domain resource unit through the unlicensed carrier, the feedback information for the first downlink data belonging to the C×L-bit feedback information, wherein C is a maximum feedback information amount corresponding to downlink data transmitted in a time-domain resource unit, L is a positive integer and L≥Q; wherein transmitting, by the terminal equipment, the feedback information for the first downlink data on the second time-domain resource unit through the unlicensed carrier further comprises: determining, by the terminal equipment, a first bit for transmitting the feedback information in the second time-domain resource unit through the unlicensed carrier according to the location of the first time-domain resource unit in the first time-domain resource set; and bearing, by the terminal equipment, the feedback information for the first downlink data in the first bit. determining, by the terminal equipment, a first bit for transmitting the feedback information in the second time-domain resource unit through the unlicensed carrier according to the location of the first time-domain resource unit in the first time-domain resource set; and bearing, by the terminal equipment, the feedback information for the first downlink data in the first bit.