A channel transmission method, comprising: determining, by a terminal, transmission time corresponding to a first channel as a first moment, wherein a Band Width Part, BWP, activated by the terminal presently is a first BWP; receiving, by the terminal, first control information from a network device, wherein the first control information comprises first indication information, and the first indication information is to indicate that a to-be-activated BWP is a second BWP; transmitting, by the terminal, no first channel at the first moment when the first BWP and the second BWP meet a predetermined rule, and RF retuning needs to be performed by the terminal for a switchover between the first BWP and the second BWP; characterized by directly activating, by the terminal, the second BWP and deactivating the first BWP without performing Radio Frequency, RF, retuning for the switchover between the first BWP and the second BWP, in response to receiving the first control information when the first BWP and the second BWP do not meet the predetermined rule, and transmitting, by the terminal, the first channel at the first moment by using the second BWP, wherein the predetermined rule comprises at least one of the followings: a central frequency point of the first BWP is not consistent with a central frequency point of the second BWP; a bandwidth size of the first BWP is not consistent with a bandwidth size of the second BWP; a frequency domain range of the second BWP exceeds a frequency domain range of the first BWP; or an RF bandwidth capacity of the terminal cannot simultaneously cover the frequency domain range of the first BWP and the frequency domain range of the second BWP. determining, by a terminal, transmission time corresponding to a first channel as a first moment, wherein a Band Width Part, BWP, activated by the terminal presently is a first BWP; receiving, by the terminal, first control information from a network device, wherein the first control information comprises first indication information, and the first indication information is to indicate that a to-be-activated BWP is a second BWP; transmitting, by the terminal, no first channel at the first moment when the first BWP and the second BWP meet a predetermined rule, and RF retuning needs to be performed by the terminal for a switchover between the first BWP and the second BWP; characterized by directly activating, by the terminal, the second BWP and deactivating the first BWP without performing Radio Frequency, RF, retuning for the switchover between the first BWP and the second BWP, in response to receiving the first control information when the first BWP and the second BWP do not meet the predetermined rule, and transmitting, by the terminal, the first channel at the first moment by using the second BWP, wherein the predetermined rule comprises at least one of the followings: a central frequency point of the first BWP is not consistent with a central frequency point of the second BWP; a bandwidth size of the first BWP is not consistent with a bandwidth size of the second BWP; a frequency domain range of the second BWP exceeds a frequency domain range of the first BWP; or an RF bandwidth capacity of the terminal cannot simultaneously cover the frequency domain range of the first BWP and the frequency domain range of the second BWP. a central frequency point of the first BWP is not consistent with a central frequency point of the second BWP; a bandwidth size of the first BWP is not consistent with a bandwidth size of the second BWP; a frequency domain range of the second BWP exceeds a frequency domain range of the first BWP; or an RF bandwidth capacity of the terminal cannot simultaneously cover the frequency domain range of the first BWP and the frequency domain range of the second BWP.