The invention provides a pressure casting machine and belongs to the field of construction machinery. The pressure casting machine mainly comprises a storage tank, a first pressure cylinder, a secondpressure cylinder, a temporary storage cylinder and a driving device. The storage tank is communicated with the first pressure cylinder through a pipeline, the first pressure cylinder is communicatedwith the temporary storage cylinder through a pipeline, and the temporary storage cylinder is communicated with the second pressure cylinder through a connecting pipeline; and an output pipeline is connected onto the second pressure cylinder. Slurry can be sequentially introduced into the first pressure cylinder, the temporary storage cylinder and the second pressure cylinder from the storage tank, and is conveyed to a construction area via the output pipeline at the earliest. The pressure casting machine with the previous design is high in degree of automation, so the maintenance cost is low,and the efficiency is high.