A transmission processing method performed by a terminal and comprising: when first transmission collides with second transmission, performing collision processing on the first transmission and the second transmission according to a collision processing policy, wherein one of the first transmission and the second transmission is transmission performed based on a new radio, NR, sidelink sending or receiving, and the other one of the first transmission and the second transmission is transmission based on an LTE Uu interface sending or receiving or transmission based on a Long Term Evolution, LTE, sidelink sending or receiving; wherein the collision processing policy is designed based on: a channel type parameter or a signal type parameter, the first transmission and the second transmission correspond to different channel types or different signal types, and priorities of the different channel types or the different signal types are predefined; and the different channel types or the different signal types comprise a channel state information, CSI, feedback; wherein the collision processing policy comprises a collision processing operation applied to one target transmission of the first transmission and the second transmission, and the collision processing operation comprises at least one of the following operations: a discarding operation of receiving, a discarding operation of sending, and transmit power reduction. when first transmission collides with second transmission, performing collision processing on the first transmission and the second transmission according to a collision processing policy, wherein one of the first transmission and the second transmission is transmission performed based on a new radio, NR, sidelink sending or receiving, and the other one of the first transmission and the second transmission is transmission based on an LTE Uu interface sending or receiving or transmission based on a Long Term Evolution, LTE, sidelink sending or receiving; wherein the collision processing policy is designed based on: a channel type parameter or a signal type parameter, the first transmission and the second transmission correspond to different channel types or different signal types, and priorities of the different channel types or the different signal types are predefined; and the different channel types or the different signal types comprise a channel state information, CSI, feedback; wherein the collision processing policy comprises a collision processing operation applied to one target transmission of the first transmission and the second transmission, and the collision processing operation comprises at least one of the following operations: a discarding operation of receiving, a discarding operation of sending, and transmit power reduction. a channel type parameter or a signal type parameter, the first transmission and the second transmission correspond to different channel types or different signal types, and priorities of the different channel types or the different signal types are predefined; and the different channel types or the different signal types comprise a channel state information, CSI, feedback; wherein the collision processing policy comprises a collision processing operation applied to one target transmission of the first transmission and the second transmission, and the collision processing operation comprises at least one of the following operations: a discarding operation of receiving, a discarding operation of sending, and transmit power reduction.