This application discloses a method for preparing a
powder-rolled
brazing plate for low-temperature
brazing, comprising: preparing
alloy powder; preparing an aluminum
alloy shell, and loading the
alloy powder into the aluminum alloy shell; performing
hot isostatic pressing and hot rolling to obtain the
brazing plate; wherein the
mass percentage of the alloy powder is: Si 6-12.5%, Cu 1.8-10%, Zn 3.8-20%, Fe 0.1-1.1%, with the balance being aluminum; the thickness of the aluminum alloy shell is 10-20 mm. This method can reduce the brazing temperature of the product, achieving brazing at 530-550℃ with excellent brazing results.