Novel red phosphors SrMgSi2O6:Eu3+ were synthesized by a gel-combustion method, with Na2CO3 as the charge compensation agent. The as-synthesized phosphors were analyzed and characterized by XRD and fluorescence spectrophotometer. The results show that the SrMgSi2O6:Eu3+ phosphor possesses a tetragonal crystal structure which is similar to that of Sr2MgSi2O7. The excitation spectrum of the SrMgSi2O6:Eu3+ sample presents wide band absorption between 220 and 300 nm, which is ascribed to the charge transfer between Eu3+ and O2-. The sharp peaks appearing after 300 nm belong to f-f transition of Eu3+, and the strongest sharp peak is located at 400 nm. Therefore, samples can be efficiently excited by ultraviolet radiation from InGaN chip. The emission spectrum consists of two strong emission peaks at 592 nm and 618 nm, which are ascribed to 5D0→7F1 and 5D0→7F2 respectively. Moreover, it is found that co-doped Gd3+ or Ti4+ can sensitize the luminescence of Eu3+ in SrMgSi2O6:Eu3+, in other words, co-doped Gd3+ or Ti4+ can improve red light emission of samples efficiently. So SrMgSi2O6:Eu3+, M(M=Gd3+, Ti4+) shows good prospect for red phosphors of white LED