The pumping uniformity of double-arched laser diode arrays side-pumped Nd∶YAG laser was reported.The optical rays from double-arched laser diode planar arrays were regarded as gauss beam approximately.With computer modeling and experimental test,the pumping uniformity characteristics in double-arched laser diode arrays side-pumped Nd∶YAG were studied.It was proved that laser output energy and laser beam quality were improved as long as the proper pumping parameters was chosen in the side-pumping method.The output energy and laser beam quality were tested by using the side-pumped structure in Nd∶YAG laser.The experiment results were analyzed and discussed.The comparison results illustrate that the theoretical models are correct.