Integral imaging 3D display is a true three-dimensional display techn o logy that records and reconstructs three-dimensional objects from different ori e ntations using micro-lens array.In view of the problem of insufficient depth o f field in integral imaging 3D display technology and the reduction of reconstruc ted image quality caused by stray light from the gap between micro-lenses,a ne w structure(double pinhole/micro-lens array) was designed to reduce stray ligh t and at the same time to increase the number of center depth planes for integral imaging 3D display,which could increase the depth of field for integral imagin g system.The designed parameter of double pinholes/micro-lens array was dete r mined according to the integral imaging principle,and the integral imaging syst em used double pinholes/micro-lens array was simulated by TracePro.The resul t s show that,the double pinholes/micro-lens array could effectively reduce st r ay for integral imaging system,and the depth of field of this system was about 20mm larger than that of the traditional system when the distance of the two la y ers of double pinhole/micro-lens array was 5mm.That is,the double pinholes/mic ro-lens array can increase the depth of field for integral imaging,and imp rove the quality of the reconstructed image.