The frequencymixing generation of 598. 1nm coherent radiation using a Q-switched dual wavelength Nd∶ YAP pulsed laser is presented. The outputwith 12mJ of energy and about 45 ns of pulse duration is obtained when the input energy of Q2switched dualwavelength laser is 149mJ. The efficiency of energy conversion ismore than 8% , and the peak power is 0. 2667MW.