In order to obtain watt-level 546nm contiounus wave (CW) output,this pape r adopts the high-power laser diode (LD) end-pumped Nd:YAG laser crystal,and tho ugh a special coating designed for the linear cavity,dual-wavelength operation at 1073.8nm and 1112.1nm can be obtained simultaneously.Inserting non-linea r crystal LBO,1.58W 546.3nm green light CW output is obtained under the 24W pump power though intra-cavit y sum- frequency,and the optic-to-optic efficiency is 6.6%.Through the adjustment of the LBO azimuth,537nm or 556nm output can be realized,by using 1073.8 nm and 1121.1nm SHG,respectively.