Abstract: MoS₂ nanotubes are obtained by the chemical vapour deposition reaction from MoO₃ powder and S in a conventional tube furnace at elevated temperature.It is shown that all of MoS₂ nanotubes are openended with uniform diameters.Some nanotubes remain attached to nanoparticles.The influences of reaction temperature,argon flow rate（reaction atmosphere） on products are studied.It is shown that nanotubes are prepared only at 810-905℃ with an appropriate argon flow rate.MoO₂ or MoO_2-xS_x is produced while argon flow rate are inaccurate.A stepwise reaction model and a newly growth mechanism of MoS₂ nanotubes are proposed based on the experimental results.