The invention relates to a device for blending pulverized fuel ash and cement. The device for blending pulverized fuel ash and cement comprises a metering tank, a primary mixing tank, a batch mixing tank, a dust removing tank, dust removers, a fan, a pulverized fuel ash tank, a cement tank, a fished product bin, a pressure air tank, pneumatic adjusting valves, a sampling ball valve, a stop valve and a safety valve, wherein the pressure air tank is connected with the bottoms and lateral portions of the metering tank, the primary mixing tank and the batch mixing tank; the pulverized fuel ash tank is connected with the bottom of the metering tank, the bottom of the cement tank and the bottom of the metering tank are connected with the bottom of the primary mixing tank, and the bottom of the finished product bin and the bottom of the primary mixing tank are connected with the bottom of the batch mixing tank; the top of the metering tank, the top of the primary mixing tank and the top of the batch mixing tank are each connected with one dust remover and then connected with the top of the dust removing tank, and the top of the dust removing tank is connected with the fan; and pipeline connection is used as the connection mode. By means of the device for blending pulverized fuel ash and cement, the problem that pulverized fuel ash and cement are not mixed evenly is solved.