A method for sending information, applied to a terminal device, wherein the method comprises: receiving (204, 304, 404, 604) first configuration information from a network device, wherein the first configuration information is used for allocating a sidelink resource and an uplink resource for the terminal device, and the sidelink resource is used for sending sidelink data of the terminal device; acquiring (308, 408, 606) second configuration information, wherein the second configuration information is used for configuring a corresponding relationship, and the corresponding relationship comprises: a relationship between a first parameter of the sidelink data and a maximum number of times of transmission; and sending an acknowledgement, ACK, or a negative acknowledgement, NACK, to the network device on the uplink resource according to the first parameter of the sidelink data and the corresponding relationship, wherein the sending the ACK or NACK to the network device on the uplink resource according to the first parameter of the sidelink data and the corresponding relationship, comprises: determining the maximum number of times of transmission of the sidelink data according to the first parameter of the sidelink data and the corresponding relationship; and in a case that the sidelink data needs a sidelink feedback and a number of times of transmission of the sidelink data does not reach the maximum number of times of transmission, sending first information to the network device on the uplink resource, wherein the first information is determined according to sidelink feedback information received by the terminal device, and the first information comprises the ACK or the NACK, wherein the first parameter of the sidelink data comprises a priority. receiving (204, 304, 404, 604) first configuration information from a network device, wherein the first configuration information is used for allocating a sidelink resource and an uplink resource for the terminal device, and the sidelink resource is used for sending sidelink data of the terminal device; acquiring (308, 408, 606) second configuration information, wherein the second configuration information is used for configuring a corresponding relationship, and the corresponding relationship comprises: a relationship between a first parameter of the sidelink data and a maximum number of times of transmission; and sending an acknowledgement, ACK, or a negative acknowledgement, NACK, to the network device on the uplink resource according to the first parameter of the sidelink data and the corresponding relationship, wherein the sending the ACK or NACK to the network device on the uplink resource according to the first parameter of the sidelink data and the corresponding relationship, comprises: determining the maximum number of times of transmission of the sidelink data according to the first parameter of the sidelink data and the corresponding relationship; and in a case that the sidelink data needs a sidelink feedback and a number of times of transmission of the sidelink data does not reach the maximum number of times of transmission, sending first information to the network device on the uplink resource, wherein the first information is determined according to sidelink feedback information received by the terminal device, and the first information comprises the ACK or the NACK, wherein the first parameter of the sidelink data comprises a priority. determining the maximum number of times of transmission of the sidelink data according to the first parameter of the sidelink data and the corresponding relationship; and in a case that the sidelink data needs a sidelink feedback and a number of times of transmission of the sidelink data does not reach the maximum number of times of transmission, sending first information to the network device on the uplink resource, wherein the first information is determined according to sidelink feedback information received by the terminal device, and the first information comprises the ACK or the NACK, wherein the first parameter of the sidelink data comprises a priority.