Abstract: Fermented foodstuff and feedstuffderived pig dung, rice and maize straw, and their 1:1 and 3:1 mixtures were added with Eisenia foetida, and the physical and chemical properties of the pig dung, straw, and their mixtures were analyzed at the commencement and after 90 days of E. foetida addition, taking no E. foetida addition as the control. After 90 days E. foetida addition, all the test materials appeared mass loss, and the loss rate was significantly greater than that of the control (P<0.01). Under E. foetida addition, the decomposed amount of pig dung-crop straw mixture was significantly higher than that of pig dung or crop straw alone (P<0.01), the mass loss of pig dungmaize straw mixture was significantly greater than that of pig dungrice straw mixture (P<0.05), the 3:1 feedstuffderived pig dungcrop straw mixture had a significantly greater mass loss than the 1:1 feedstuffderived pig dungcrop straw mixture (P<0.01), while the 1:1 and 3:1 mixtures of foodstuffderived pig dung and crop straw had less difference in their mass loss (P>0.05). E. foetida addition increased the total and available N, total and available P, and total and available K contents of test materials, but decreased the materials organic matter content and pH value. The 1:1 foodstuffderived pig dungcrop straw mixture had the largest variation range of organic matter and available N, P, and K contents, suggesting that E. foetida played the greatest role in the decomposition of this mixture. This study would provide theoretical basis for the resource utilization of pig dung and crop straw.