Drum pulperis a product which incorporates pulping and screening function and is particularly suitable for pulping the unsorted waste paper raw materials. For expanding the recovery and utilization the secondary fiber, reducing the environmental pollution, saving the energy, reaching the localization of papermaking equipment and saving the foreign exchange, the product has a greater economic and social benefits. Drum pulper is used for disintegrating continuously and coarse screening under a high concentration of waste paper raw materials (14%-22%). Feature of Drum pulper:1. Perfect defibering;2. Excellent pulp quality;3. Significant energy savings;4. Good deinking mechanism;5. Reliable continuous slagging system;6. Reducing the equipment cost;7. Saving manpower;8. Lowest maintenance cost.