Abstract: In order to understand the effect of“agricultural residues degradation and increase production agent”on garlic, five treatments were designed with water as control. The results showed that the yield of garlic head obviously increased after the application of this agent with the increase rate of 6.4%-15.4%, treatment 3 had the highest yield of 1870 g/m², which was 250 g/m² higher than that of CK. The yield of garlic sprouts also showed the same rule, the increase was 34- 57 g/m², and the income increased 0.07- 0.12 yuan/m². The economic benefit increase was obvious, compared with that of CK, the income increase of treatments applied “agricultural residues degradation and increase production agent”was 1.73, 2.25, 0.84, 1.97 and 0.95 yuan/m², respectively. The highest income was treatment 3 of 14.50 yuan/m². Special grade rate and first- grade rate increased after the application of this agent, yellow leaf number decreased, while green leaf number increased, the ability to resist disease in the late period was enhanced. Treatment 3 was the optimal in this experiment, under conventional fertilization, 0.75 mL/m²“agricultural residues degradation and increase production agent” mixed with 90 g/m² water for soil treatment and 0.3 mL/m²“agricultural residues degradation and increase production agent”mixed with 90 g/m² water after the green period and bolting was the most economical and effective way.