Abstract: Abstract: In the 3 period, spraying Paclobutrazol proved on millet varieties of JinGu 21 regulation, improved the stress resistance of JinGu 21, with 5 concentration testing. The results show that: after spraying Paclobutrazol, the JinGu 21's internode length (1-9) has obvious inhibiting effect, and reduce the number of internode, the plant height decreased significantly; the best period of spraying Paclobutrazol for millet is 9 leaves stage after seedling; the optimal concentration of Paclobutrazol is 0.4-0.5%; JinGu 21 millet's yield and quality did not affect.