NOVELTY - Comprehensive processing and utilization of cow excrement comprises: (i) mounting a microecological fermentation bed in a cow living area, where the microecological fermentation bed comprises a padding; (ii) mounting a drain outlet on one side of the cow living area near a fence, where the outer side of drain outlet is connected with a drain channel; and (iii) collecting cow excrement on an earthworm field, spreading the cow excrement into wide and narrow rows of ridges, digging holes on ridges for introducing earthworms, maintaining the humidity at 75-85% and decomposing the cow excrement.    USE - The method is useful for comprehensive processing and utilization of cow excrement.    ADVANTAGE - The method: is simple; has strong decomposing capacity of cow excrement and other wastes; meets the environmental requirements of cow growth; increases the disease-resistant capacity of cow; reduces the feeding cost; reaches zero emission of cow excrement and hence realizes comprehensive utilization of cow excrement.    DETAILED DESCRIPTION - Comprehensive processing and utilization of cow excrement, comprises: (i) mounting a microecological fermentation bed in a cow living area, where the microecological fermentation bed is provided with a padding, which is prepared by organic materials and fermentation of microbial agent composition and the bed is arranged in a groove with the same volume of the bed and the depth of the groove is 0.6-1.2 m; (ii) mounting a drain outlet on one side of the cow living area close to a fence, where the outer side of the drain outlet is connected with a baffle plate with multiple small holes and a drain channel, which is connected with a methane tank or a liquid storage tank; and (iii) collecting the cow excrement on an earthworm field, spreading the cow excrement into wide and narrow rows of ridges after 5-8 days, digging holes on the ridges after 15-25 days for introducing earthworms, maintaining the humidity at 75-85% and decomposing the cow excrement at 15-25 degrees C.