The purpose of this study was to assess the impact of the use of Bio Livestock Clean System (BLCS) inoculants supplemented with feed and litter fillers on broiler performance. A total of 240 1-day-old Luong Phuong chickens, arranged completely randomly into 4 treatments, with 20 birds/treatment and 3 replications / treatment. Treatment 1: Diet basic by Company (control diet), Treatment 2: As diet basic plus BLCS 1 kg/Ton Feed), Treatment 3: as diet basic plus BLCS (1 kg per 30 m2 floor), Treatment 4: As diet basic plus BLCS kg/Ton Feed and BLCS (1 kg per 30 m2 cage floor). The result that the use of BLCS in addition to feed and BLCS on cage floor has affected the feed intake rate of experimental chickens, chickens tend to receive more feed. The weight of the experiment ended was improved from 5.37% - 7.17% when adding BLCS in to feed/or on cage floor compared to no supplementation. Using of the BLCS plus diet and the plus BLCS with 1 kg per 30 m2 cage floor improved the daily weight gain from 5.43 to 7.16% compared to not using BLCS. Using BLCS in the diet and BLCS on cage floor can achieve daily weight gain higher than that control diets. Using BLCS in broiler feed was 1 kg/ton and cage floor 1 kg/30 m2