The omnidirectional total reflectors based on one-dimensional dielectric and magnetic photonic crystals were investigated in this paper.The transmission matrix method was adopted to analyze the transmission properties of such reflectors.In order to obtain broad omnidirectional total reflection bandwidth,the decimal Genetic algorithm was used to optimize their structural parameters including the thickness ratios of the layers and the numbers of periods.The calculation results show that,with the more parameters(including the number of periods and the thickness ratios of the layers) participating in the optimization,the omnidirectional total reflection band becomes wider,the number of the layers becomes less,and the total thickness of the whole structure becomes thinner.Finally,an optimal design described as(0.255A0.255B)5(0.169A0.066B)8 is obtained.The omnidirectional total reflection bandwidth can reach to 1.34ω0,the number of the layers is just 26,and the whole thickness is just 1.8634λ0.The whole structure is very simple.