The invention discloses a combustion type sludge treatment device comprising a furnace body and a feeding mechanism. A combustion chamber and a smoke discharge chamber are arranged in the furnace body. The feeding mechanism comprises a first shell, a second shell, a first screw material pushing rod and a second screw material pushing rod. The first shell comprises an inner shell body and an outer shell body. The outer shell body is provided with an air inlet and an air outlet, wherein the air inlet and the air outlet communicate with a gap. One end of the first shell extends into the furnace body. A feed port in the first shell is located outside the furnace body. A discharge port in the first shell is located inside the smoke discharge chamber. The air inlet in the first shell communicates with the combustion chamber. The air outlet in the first shell communicates with the outside. The first screw material pushing rod is located in the inner shell body and comprises a main shaft. An air exhaust channel is arranged in the main shaft. One end of the second shell extends into the furnace body. A feed port of the second shell communicates with the discharge port of the first shell, and a discharge port of the second shell communicates with the combustion chamber. The second screw material pushing rod is located in a second cavity. The combustion type sludge treatment device is economical and environmentally friendly.