A signal processing method, comprising: obtaining (101, 201, 301), by a signal forwarding device (A, B), first indication information, wherein the first indication information comprises a measurement parameter; performing (102, 202, 302), by the signal forwarding device (A, B) based on the measurement parameter, signal quality measurement on a received first uplink signal sent by a target user equipment, UE; sending (103, 203, 303), by the signal forwarding device (A, B), the signal quality measurement result to a base station; and if obtaining second indication information sent by the base station, further receiving (106, 206, 306), by the signal forwarding device (A, B), a second uplink signal sent by the target UE, and forwarding (107, 207, 307) the second uplink signal to the base station, wherein the second indication information is sent (105, 205, 305) by the base station to the signal forwarding device (A, B), after the base station determines, based on the signal quality measurement result, to allocate the target UE to the signal forwarding device (A, B) as subordinate UE; wherein the second indication information is comprised in a second downlink channel between the base station and the target UE, and the obtaining the first indication information or the second indication information by the signal forwarding device (A, B) comprises: monitoring the second downlink channel based on third indication information sent by the base station, to obtain the second indication information, wherein the third indication information carries identification information used to indicate the second downlink channel. obtaining (101, 201, 301), by a signal forwarding device (A, B), first indication information, wherein the first indication information comprises a measurement parameter; performing (102, 202, 302), by the signal forwarding device (A, B) based on the measurement parameter, signal quality measurement on a received first uplink signal sent by a target user equipment, UE; sending (103, 203, 303), by the signal forwarding device (A, B), the signal quality measurement result to a base station; and if obtaining second indication information sent by the base station, further receiving (106, 206, 306), by the signal forwarding device (A, B), a second uplink signal sent by the target UE, and forwarding (107, 207, 307) the second uplink signal to the base station, wherein the second indication information is sent (105, 205, 305) by the base station to the signal forwarding device (A, B), after the base station determines, based on the signal quality measurement result, to allocate the target UE to the signal forwarding device (A, B) as subordinate UE; wherein the second indication information is comprised in a second downlink channel between the base station and the target UE, and the obtaining the first indication information or the second indication information by the signal forwarding device (A, B) comprises: monitoring the second downlink channel based on third indication information sent by the base station, to obtain the second indication information, wherein the third indication information carries identification information used to indicate the second downlink channel.