NOVELTY - Treatment of municipal wastewater sludge involves providing earthworm rectangular breeding bed body; providing four walls and bottom with dense and uniform aperture of 0.5-1.0 cm; dividing earthworm bed layer into four layers from up to down consisting of 2-3 cm thick and 2-3 cm long dry straw layer, 5-10 cm thick filter mud lower layer, 2-13 cm thick cow dung or pig manure layer, and 5-10 cm thick filter mud upper layer; putting earthworm to culture bed; and breeding earthworm at 15-30 degrees C for 21 days until earthworm excrements form.    USE - Treatment of municipal wastewater sludge.    ADVANTAGE - The method is energy-saving and environment friendly, has simple operation, and low manufacturing cost. It produces sludge containing earthworm excrement that can be used as agricultural and forestry production needed fertilizer.    DETAILED DESCRIPTION - Treatment of municipal wastewater sludge involves providing earthworm rectangular breeding bed body with depth of 25-35 cm, length of 45-55 cm, and width of 30-40 cm; providing four walls and bottom with dense and uniform aperture of 0.5-1.0 cm; dividing earthworm bed layer into four layers from up to down consisting of 2-3 cm thick and 2-3 cm long dry straw layer, 5-10 cm thick filter mud lower layer, 2-13 cm thick cow dung or pig manure layer, and 5-10 cm thick filter mud upper layer, in which bottom of overhead ground is 5-8 cm high; putting earthworm to culture bed; breeding earthworm fat 15-30 degrees C, in which initial breeding starts at first week; watering culture bed every 2-3 days in first week and 1-2 days in second week to 21 days until earthworm excrements form in dry straw, sludge and cow dung or pig manure and decompose; putting material in whole cultivating bed laying on screen net, including earthworm, earthworm manure and decomposed dry straw; recycling young earthworm; and drying earthworm excrement under the sun of via drying machine.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of rectangular breeding bed body for earthworms.