A kind of 3-D free-space optical interconnect integrated module with Mesh network topological configuration is presented in this paper. The highlight is laid on the optical design of the light transceiver lens array of the system module on the basis of the image aberrations. Two different design methods are compared. The results show that the method of slantwise incidence through the center of the lens directly has an output signal spot size of 0.4630 μm. It is the better method to meet the demands of 3-D free-space optical Mesh interconnect integrated module.