Under greenhouse condition，this paper studied the bio-control efficiency of NBIN863 strain on
tomato root knot nematodes and its growth promotion effect and colonization ability on tomato. The result showed
that the bio-control efficiency of NBIN863 strain on tomato root knot nematode was up to 54.48%. Compared with
the blank control，the plant height，root length and total fresh weight were increased by 49.10%，43.69% and
52.50%，respectively. We found that NBIN863 strain could stably colonize in rhizophere at the concentration of
8.37×105cfu·g^-1 on the 30th day after inoculation.