The optical characteristic of Nd:Y_3Al_5O_(12)(Nd:YAG) ceramic,a new type solid-state laser material,was introduced,and LD pumped miniature laser with Nd:YAG ceramic was developed.The laser thresh-old is only (48 mW) with (R=97%) output coupler.With (1.5 W) pumping power,(516 mW CW) laser output at 1 064 nm has been obtained corresponding to an optical-to-optical efficiency of 34.4%.