A reference signal sending method, the method comprising the steps of: • determining, by a network device, a transmit power used to transmit a reference signal to a terminal device on a first port and on a second port, the first and second port being the currently scheduled ports, wherein the first port is scheduled on a first resource element, RE, and the second port is scheduled on a second RE, wherein the first port and the second port do not form a code division multiplexing, CDM, group, wherein the CDM group is a group formed by those ports multiplexed on a same RE in a CDM manner, wherein the determining, by the network device, the transmit power used to transmit the reference signal on the first port and on the second port comprises: ∘ determining, by the network device, for each port among the first port and the second port, an initial transmit power of the port based on a power allocation ratio between the initial transmit powers of the first and second port, and determining, by the network device, for each port among the first port and the second port, a power boosting value based on the power allocation ratio between the initial transmit powers, ∘ determining, by the network device, for each port among the first port and the second port, the transmit power of the port, the transmit power being based on the corresponding initial transmit power of the port and the corresponding power boosting value of the port • sending, by the network device, a quantized value of the power allocation ratio to the terminal device; • sending, by the network device, the reference signal on the first port on the first RE with the transmit power of the first port and the reference signal on the second port on the second RE with the transmit power of the second port. • determining, by a network device, a transmit power used to transmit a reference signal to a terminal device on a first port and on a second port, the first and second port being the currently scheduled ports, wherein the first port is scheduled on a first resource element, RE, and the second port is scheduled on a second RE, wherein the first port and the second port do not form a code division multiplexing, CDM, group, wherein the CDM group is a group formed by those ports multiplexed on a same RE in a CDM manner, wherein the determining, by the network device, the transmit power used to transmit the reference signal on the first port and on the second port comprises: ∘ determining, by the network device, for each port among the first port and the second port, an initial transmit power of the port based on a power allocation ratio between the initial transmit powers of the first and second port, and determining, by the network device, for each port among the first port and the second port, a power boosting value based on the power allocation ratio between the initial transmit powers, ∘ determining, by the network device, for each port among the first port and the second port, the transmit power of the port, the transmit power being based on the corresponding initial transmit power of the port and the corresponding power boosting value of the port wherein the first port is scheduled on a first resource element, RE, and the second port is scheduled on a second RE, wherein the first port and the second port do not form a code division multiplexing, CDM, group, wherein the CDM group is a group formed by those ports multiplexed on a same RE in a CDM manner, wherein the determining, by the network device, the transmit power used to transmit the reference signal on the first port and on the second port comprises: ∘ determining, by the network device, for each port among the first port and the second port, an initial transmit power of the port based on a power allocation ratio between the initial transmit powers of the first and second port, and determining, by the network device, for each port among the first port and the second port, a power boosting value based on the power allocation ratio between the initial transmit powers, ∘ determining, by the network device, for each port among the first port and the second port, the transmit power of the port, the transmit power being based on the corresponding initial transmit power of the port and the corresponding power boosting value of the port ∘ determining, by the network device, for each port among the first port and the second port, an initial transmit power of the port based on a power allocation ratio between the initial transmit powers of the first and second port, and determining, by the network device, for each port among the first port and the second port, a power boosting value based on the power allocation ratio between the initial transmit powers, ∘ determining, by the network device, for each port among the first port and the second port, the transmit power of the port, the transmit power being based on the corresponding initial transmit power of the port and the corresponding power boosting value of the port • sending, by the network device, a quantized value of the power allocation ratio to the terminal device; • sending, by the network device, the reference signal on the first port on the first RE with the transmit power of the first port and the reference signal on the second port on the second RE with the transmit power of the second port.