Abstract: The result of the experiment of applying the biogas residue and mushroom substrate to banana plants indicated that the effect of the mushroom substrate or the biogas residue on the growth and the fruiting of bananas is significant;the treatment of the mixed fertilizer of the two performs better than the treatment of either of them separately,especially on the effect of the leaf area,leaf quantity,fruit bunch weight,fruit finger quantity,the first hand numbers and weight.The mixed fertilizer also significantly increased the content of total potassium with the quantity of the fertilizer significantly correlating with the content of total potassium.When being fertilized separately,the mushroom substrate performs better than the biogas residue,but neither of their quantities significantly correlates with the growth or fruiting,which indicates the quantity of application must be controlled;fertilizing each banana plant with16kg biogas residue or 20kg mushroom substrate one year seems to be a proper treatment.