Abstract:A scheme of diode-pumped solid2state laser is designed using Nd∶YVO4 or Yb∶YAG as working medium , Cr4 + ∶YAG as passively Q-switch and sandwich-structure. The laser has many advantages ,including small size and weight , high repetition rate and peak power , firmness , etc. So the laser is fit for ballistic missile’s laser fuze.