The article studied the effect of wheat straw pretreatment with pig manure biogas slurry on the performance of wheat straw anaerobic digestion. The different amount of biogas slurry were added to wheat straw to make the pretreatment moisture content at 30%,50%,70% and 90%,respectively. The result showed that,with the moisture content of 70%,at the mesophilic condition and pretreated for 3 days,the pretreated wheat straw obtained the best biogas production,reaching the VS methane production rate of 243. 90 m...