The aim of current study is to increase the coking resistance ability as well as steam gasification of deposited carbon on Ni/BCC catalyst. It was available to regenerate activity of catalyst. By the way, product gases propose to achieve an enhancement of the product gas quality by not only recovering energy from tar reforming but also addition by-product gas from steam gasification of the Ni/BCC char at relative low temperature. To decompose tar of biomass gasification by the use of Ni/BCC catalyst has been investigated under mild conditions in a laboratory scale fluidized bed gasifier with introducing steam as a gasifying agent and nitrogen as the product gas carrier. A conventional Ni/АЬОз catalyst also was selected to compare with the Ni/BCC catalyst in the presence of steam. In this study, the Ni/BCC catalyst was consumed at different steam feed rate so as determine the effect of steam feed rate on the crystallite size of catalyst; catalytic tar reforming temperature, the space velocity as a function of the gas yield and biomass carbon conversions in fluidized bed gasifier were investigated. The product gas components was discussed in detail and compared between both cases of the absent of steam and the presence of steam.