The characteristics of a LD pumped highly efficient Nd:YVO4 laser were presented. The output power of 230 mW with an optical conversion efficiency of 45% has been obtained.29.8 mW of green fundamental spatial mace light have been generated with a"light to light"conversion efficiency of 12.4% when the input pump power was 240 mW.Data are also presented for the spectral variation of the output with input pump POwer.We have observed an average laser wavelength variation of 1.05×10-3 nm/mW versus pump power.Using a synchronism-search compensation frequency-stabilized system and an electrooptic switch technique to the frequency-doubled pulsed ring Nd:YAG laser,we have obtained a frequency-stabilized and frequency-doubled laser at 532 nm,with a pulse width of 100μs,peak power of more than 100 W,and frequency stability of less than 10 MHz,while the intensity relaxation oscillation was eliminated.