The embodiment of the application discloses a pilot signal sending and receiving method and device. The pilot signal sending method comprises: establishing a first corresponding relationship between carrier identifiers and pilot patterns of a first class of pilot signals; establishing a second corresponding relationship between the carrier identifiers and a resource block set; obtaining a target carrier identifier of a target carrier; determining the position of a target resource block set corresponding to the target carrier identifier; determining a target pilot pattern of the first class of pilot signals corresponding to the target carrier identifier; mapping the first class of pilot signals on each resource block in the target resource block set on the target carrier according to the target pilot pattern; sending the first corresponding relationship and the second corresponding relationship to a terminal; and sending to the terminal the target carrier on which the first class of pilot signals is mapped. In the method, the pilot signals are mapped only in the resource block set corresponding to the carrier identifiers on the carrier, and overall pilot density and quantity can be reduced, thereby reducing pilot redundancy and expenses.