To evaluate the effects of different additive on the luminous intensity of pyrotechnics composites containing KClO₄ and Al powder, the nano-CuO/CNTs composite particles were prepared by a boiling reflux precipitation method. Their structures and performance were characterized by transmission electron microscope (TEM), X-raydiffraction(XRD) and simultaneous DSC-TG apparatus(DSC-TG). The luminous intensity of pyrotechnics formula with different additive was tested. Results show that the CuO particles can be loaded on the surface of CNTs, and the average diameter of CuO/CNTs is 61.1 nm, and the size of loaded copper oxide particles is 8.8 nm, and its loading capacity is 30%. The luminous intensity of composite formulation containing nano-CuO/CNTs, Al and KClO₄ is better than that of the other ones containing single additive. Compared to the same mass ratio mechanical mixture formula containing CNTs, CuO, Al and KClO₄, the luminous intensity of composite formulation containing nano-CuO/CNTs composite, Al and KClO₄ is increased by 11.2%, indicating that the CuO/CNTs composite particles has stronger positive synergistic catalytic effect.