Sludge conveying device

The utility model provides a sludge conveying device which ensures that the condition of dropping sludge is not easy to happen in a sludge conveying process, occupies a small land area and can be used for saving the land occupying cost. The sludge conveying device comprises a material discharging hopper, at least two stages of conveyors and a sludge cabin, wherein the blanking opening of the material discharging hopper is aligned to the conveyors; and the conveyors are communicated to the sludge cabin. The sludge conveying device is characterized in that particularly, the conveyors are shaftless spiral conveyors; a driving device is externally connected with the shaftless spiral conveyors; the blanking opening of the material discharging hopper is aligned to the feeding opening of the first stage of the shaftless spiral conveyor; and the blanking opening of the front stage of the adjacent shaftless spiral conveyor is communicated with the feeding opening of the last stage of the shaftless spiral conveyor through a conveying flange; and the blanking opening of the last stage of the shaftless spiral conveyor is communicated to the sludge cabin.