A signal transmission method, performed by a mobile terminal and comprising following steps: acquiring transmission configuration information of a first service signal, and determining a first time-frequency resource allocated for the first service signal in PUCCH according to the transmission configuration information, wherein the transmission configuration information comprises a channel format and a transmission mode, and the transmission mode is a repetition mode; receiving resource indication information, wherein the resource indication information is generated according to a second time-frequency resource for a second service signal; and the signal transmission method further comprising: determining a start position and/or an end position for signal processing in the first time-frequency resource according to the channel format and the second time-frequency resource indicated by the resource indication information, wherein the channel format comprises a first format having an error detection and a second format not having the error detection, and the channel format is distinguished by having the error detection, the signal processing is signal cancel, and the signal transmission method is characterized in that the step of determining the start position and/or the end position for the signal processing in the first time-frequency resource according to the channel format and the resource indication information comprises: determining a conflict resource between the first time-frequency resource and the second time-frequency resource indicated by the resource indication information when the channel format is a channel format with a cyclic redundancy check, CRC; using a resource where the conflict resource is located in the first time-frequency resource from repetitions as a target repetitive resource, wherein the repetitions are all first time-frequency resources allocated for the first service signal; using a start position of the conflict resource on the target repetitive resource as the start position for the signal processing; and using an end position of the target repetitive resource as the end position for the signal processing. acquiring transmission configuration information of a first service signal, and determining a first time-frequency resource allocated for the first service signal in PUCCH according to the transmission configuration information, wherein the transmission configuration information comprises a channel format and a transmission mode, and the transmission mode is a repetition mode; receiving resource indication information, wherein the resource indication information is generated according to a second time-frequency resource for a second service signal; and the signal transmission method further comprising: determining a start position and/or an end position for signal processing in the first time-frequency resource according to the channel format and the second time-frequency resource indicated by the resource indication information, wherein the channel format comprises a first format having an error detection and a second format not having the error detection, and the channel format is distinguished by having the error detection, the signal processing is signal cancel, and the signal transmission method is characterized in that the step of determining the start position and/or the end position for the signal processing in the first time-frequency resource according to the channel format and the resource indication information comprises: determining a conflict resource between the first time-frequency resource and the second time-frequency resource indicated by the resource indication information when the channel format is a channel format with a cyclic redundancy check, CRC; using a resource where the conflict resource is located in the first time-frequency resource from repetitions as a target repetitive resource, wherein the repetitions are all first time-frequency resources allocated for the first service signal; using a start position of the conflict resource on the target repetitive resource as the start position for the signal processing; and using an end position of the target repetitive resource as the end position for the signal processing. determining a conflict resource between the first time-frequency resource and the second time-frequency resource indicated by the resource indication information when the channel format is a channel format with a cyclic redundancy check, CRC; using a resource where the conflict resource is located in the first time-frequency resource from repetitions as a target repetitive resource, wherein the repetitions are all first time-frequency resources allocated for the first service signal; using a start position of the conflict resource on the target repetitive resource as the start position for the signal processing; and using an end position of the target repetitive resource as the end position for the signal processing.