A series of novel Sr7-xSb2O12∶xDy3+(x=0~0.35) (mole percentage) phosphors were obtained by high temperature solid-state reaction. Its phase structure, luminescence properties, thermal stability and fluorescent decay lifetime were investigated. The characteristic emissions centered at 482 nm and 576 nm of Sr7-xSb2O12∶xDy3+ were observed under the excitation light of 350 nm. When x=0.056, the Dy3+ concentration quench, and the Sr6.944Sb2O12∶0.056Dy3+CIE chromaticity coordinates are (0.340 8, 0.349 3). The quenching mechanism is attributed to the dipole-dipole interaction between Dy3+. When x=0.14, the phosphors can emit white light with color coordinates (0.310 9, 0.314 0). In addition, the luminescence intensity of Sr7-xSb2O12∶xDy3+ at 453 K is about 83.3% of that at room temperature, showing good thermal stability. The above research results suggest that the Sr7-xSb2O12∶xDy3+ phosphor is expected to be used in UV-excited white light emitting diode.