A Nd:YVO4 laser at 1064 nm pumped by a wave-locked 878.6 nm laser diode is achieved. An output power of 5.75 W at 1064 nm for an absorbed pump power of 7.41 W, corresponding to an optical efficiency of 80.2%, optical to optical efficiency of 77.6%. The temperature characteristics of wave-locked 878.6 nm, wave-unlocked 808 nm and 878.6 nm pump laser are also researched. The result shows that wave-locked 878.6 nm pumped Nd:YVO4 laser has excellent output stability when the temperature varies from 10 ℃ to 40 ℃.