A wireless communication method, comprising: determining, by a first terminal, a transmission power for a first physical sidelink channel according to a first criterion, the first criterion being used for indicating a manner of determining a transmission power for a sidelink channel that is used for communication between terminals; and transmitting, by the first terminal, the first physical sidelink channel to a second terminal with the transmission power for the first physical sidelink channel, wherein the determining, by the first terminal, the transmission power for the first physical sidelink channel according to the first criterion comprises: determining the transmission power for the first physical sidelink channel according to a first maximum transmission power, a second maximum transmission power, a first transmission power, and a second transmission power, wherein the first maximum transmission power is a maximum transmission power of the first terminal, the second maximum transmission power is determined according to first configuration information, the first configuration information comprises a first mapping relationship, and the first mapping relationship is a mapping relationship between a maximum transmission power and at least one of priority information or a channel busy ratio, CBR, the first transmission power is determined according to a first path loss, the first path loss is a path loss between the first terminal and a network device, the second transmission power is determined according to a second path loss, and the second path loss is a path loss between the first terminal and a second terminal, wherein the transmission power for the first physical sidelink channel satisfies the following formula: P = min P cmax, P max − CBR, min P 1 P 2 wherein P is the transmission power for the first physical sidelink channel, P 1 is the first transmission power, P 2 is the second transmission power, P cmax is the first maximum transmission power, and P max-CBR is the second maximum transmission power. determining, by a first terminal, a transmission power for a first physical sidelink channel according to a first criterion, the first criterion being used for indicating a manner of determining a transmission power for a sidelink channel that is used for communication between terminals; and transmitting, by the first terminal, the first physical sidelink channel to a second terminal with the transmission power for the first physical sidelink channel, wherein the determining, by the first terminal, the transmission power for the first physical sidelink channel according to the first criterion comprises: determining the transmission power for the first physical sidelink channel according to a first maximum transmission power, a second maximum transmission power, a first transmission power, and a second transmission power, wherein the first maximum transmission power is a maximum transmission power of the first terminal, the second maximum transmission power is determined according to first configuration information, the first configuration information comprises a first mapping relationship, and the first mapping relationship is a mapping relationship between a maximum transmission power and at least one of priority information or a channel busy ratio, CBR, the first transmission power is determined according to a first path loss, the first path loss is a path loss between the first terminal and a network device, the second transmission power is determined according to a second path loss, and the second path loss is a path loss between the first terminal and a second terminal, wherein the transmission power for the first physical sidelink channel satisfies the following formula: P = min P cmax, P max − CBR, min P 1 P 2 wherein P is the transmission power for the first physical sidelink channel, P 1 is the first transmission power, P 2 is the second transmission power, P cmax is the first maximum transmission power, and P max-CBR is the second maximum transmission power. determining the transmission power for the first physical sidelink channel according to a first maximum transmission power, a second maximum transmission power, a first transmission power, and a second transmission power, wherein the first maximum transmission power is a maximum transmission power of the first terminal, the second maximum transmission power is determined according to first configuration information, the first configuration information comprises a first mapping relationship, and the first mapping relationship is a mapping relationship between a maximum transmission power and at least one of priority information or a channel busy ratio, CBR, the first transmission power is determined according to a first path loss, the first path loss is a path loss between the first terminal and a network device, the second transmission power is determined according to a second path loss, and the second path loss is a path loss between the first terminal and a second terminal, wherein the transmission power for the first physical sidelink channel satisfies the following formula: P = min P cmax, P max − CBR, min P 1 P 2 wherein P is the transmission power for the first physical sidelink channel, P 1 is the first transmission power, P 2 is the second transmission power, P cmax is the first maximum transmission power, and P max-CBR is the second maximum transmission power.