Abstract: 480 one-day-old healthy Avian broilers were selected and randomly divided into four groups, with four repetitions in each group, with 30 broilers in each repetition. In control group, the broilers were fed with the basic diet. In three test groups, the broilers were given with diluent of liquid nano vitamin by 4 000,6 000 and 8 000 times. The experiment lasted 42 days. The experiment was conducted to study the effects of liquid nano vitamin on the growth performance and carcass quality of broilers. The results showed that liquid nano vitamin increased significantly the average daily weight gain,the feed efficiency and slaughter weight of broilers （P〈O.O1） and significantly decreased the average daily intake and death rate of broilers （P〈O.O1）. The slaughter test results showed that hquid nano vitamin could significantly increase the semi-eviscerated percentage,full-eviscerated percentage,breast muscle ratio and leg muscle ratio of broilers （P〈O.OI）, and it had certain effects on the slaughter rate, without significant difference （P 〉0.05 ）. In a word, liquid nano vitamin could significantly improve the growth performance and carcass quality of broilers and higher level of liquid nano vitamin had better production efficiency.