The invention discloses a process for processing waste circuit boards to prepare copper alloy powder by a mechanical physical method. The process comprises the steps of waste circuit board crushing pretreatment, airflow separation, magnetic separation iron removal, mechanical pulverization, screening, shaking table sorting, ball-milling impurity removing, ball-milling refining, powder purificationtreatment and other procedures, and the copper alloy powder is finally obtained. The process has the following advantages that the obtained copper alloy powder mainly contains Cu, Sn, Pb and Fe, theingredient and content of the obtained copper alloy powder is within the range required by a copper base friction material, the obtained copper alloy powder can be directly applied to prepare the copper base friction material, a small amount of tailings generated in the whole process is easy to process, and full recovery of metal can be realized; and compared with other methods capable of realizing cyclic regeneration of valuable metals in the waste circuit boards, the process adopts the mechanical physical method without a metallurgical process, direct materialization of waste metallic coppercan be realized, and the process is simple, low in production cost and energy consumption and less in pollution.