This is the first report of using the microwave heating technique to synthesize calcium sulphide activated by europium whose structure is determined as the face-centered cubic by conventional X-ray powder diffraction method.The phosphor has maximum excitation peaks located at 280 nm and 560 nm and the maximum emission of the phosphor is 630 nm.When the concentration of Eu2+ in CaS increases from 1.0×10-5 to 1.0×10-2 mole per mole host,the body colour of the calcium sulphide activated with europium changes from white,through light-red to pink to deep-red.The phosphor obtains the longest afterglow at the concentration of 0.1% Eu2+-doped and is a kind of good material excited by sunlight.