The invention discloses a high-strength high-conductivity free-cutting copper alloy material and a preparation method thereof. The copper alloy material is characterized by comprising the following chemical components in percentage by weight: 0.6-1.5 percent of Pb, 0.6-1.5 percent of Ni, 0.1-0.5 percent of P, 0.01-0.05 percent of R and the balance of Cu, wherein R is either or both of trace elements, i.e., lanthanum and cerium. The preparation method comprises the steps of smelting, extruding, cleaning, cold working and annealing. The tensile strength of a processed bar product is 550-620MPa, the yield strength is 490-560MPa, the electrical conductivity is more than or equal to 50 percent IACS, the cutting machining performance is 70 percent (compared with 100 percent of HPb63-3), and the elongation percentage is more than or equal to 3 percent. The copper alloy material has the properties of high strength, high conductivity, free cutting and the like, and a production process is nontoxic and environment-friendly, so that the copper alloy material can be used for replacing a beryllium-copper material along with which extremely toxic substances are produced in a production process,.