Effects of lead(Ⅱ) 8-hydroxyquinolinate (PbHql₂), copper(Ⅱ) 8-hydroxyquinolinate (CuHql₂), nickel(Ⅱ) 8-hydroxyquinolinate (NiHql₂), aluminium(Ⅲ) 8-hydroxyquinolinate (AlHql₃), lead(Ⅱ) copper(Ⅱ) 8-hydroxyquinolinate (PbCuHql₄), lead(Ⅱ) nickel(Ⅱ) 8-hydroxyquinolinate (PbNiHql₄), copper(Ⅱ) nickel(Ⅱ) 8-hydroxyquinolinate (CuNiHql₄) and their mixtures on the combustion characteristics (at the pressure range of 4.0~10.0 MPa) of NEPE propellants were experimentally studied. Results show that the burning rates increased and the pressure exponents decreased in a certain extent with the addition of 8-hydroxyquinoline metal derivatives. The pressure exponents could be decreased efficiently with the addition of copper(Ⅱ) 8-hydroxyquinoline metal derivatives and the burning rates could be increased obviously with the addition of nickel(Ⅱ) 8-hydroxyquinoline metal derivatives, such as, the pressure exponent at the pressure range of 4.0~7.0 MPa could be decreased to 0.54 by CuHql₂/PbCuHql₄/CB system,the burning rate at the pressure of 4.0 MPa could be increased about 53.4%, and the pressure exponent at the pressure range of 4.0~7.0 MPa be decreased to a satisfied value of 0.58.