The low temperature vacuum drier for processing leather includes one cover on the machine frame, at least one layer of working board with heating element and vacuumizing ports and hoisted by means of oil cylinder onto the machine frame, one liquid collecting tank connected to the liquid draining grooves and connected to the vacuum pump, at least two safety devices on the uprights of the machine frame, one condensation system connected to the working board, one sealing cover below the working board, one cooling pipeline around the working board, and vacuum pump comprising oil circulating vacuum pump and Roots vacuum pump. The present invention has high vacuumizing capacity, lowered operation temperature, no damage on the leather tissue and raised quality of dried leather.