Etoxazole is a oxazole special acaricide, azocyclotin is a broad spectrum acaricide with strong contact toxicity ,by compound of the two composition,the obtained composite suspension concentrate has the synergistic effect.The field efficacy trials of 23% etoxazole and azocyclotin suspension concentrate on panonychus citri were achieved. The results showed that the acaricide had both excellent fast-acting property and long-last period persistence when the concentration were 200，100，50 mg/kg respectively,the control effect were all above 95% after 1,3,10,15,20,30 days;compared with the check sample ,100 mg/kg 20% azocyclotin suspension concentrate and 110 g/L etoxazole suspension concentrate,the control effects were equivalent to azacyclotin,and he control effects were better than that of etoxazole.