Abstract: Based on the structural and material characteristics and requirements of the accuracy of quasi-spherical load in the process of assembly, the study on the assembly process of microspheres and wire array was carried out. And according to the assembly process of wire array, we finished the assembly of wire array with 8 mm diameter, and tungsten wire with 10 m diameter; the assembly of a micro ball with 3 mm diameter and glass fiber with 200 m diameter was performed on a foam microsphere micro-assembly system. Quasi-spherical load was successfully applied in physical tests of quasi-spherical load, and satisfactory results were achieved. It is expected to play a greater role in inertial confinement fusion (ICF) and physical tests of the quasi-spherical load in the future.