In this paper, one kind of low density SMC has been introduced. Hollow-glass micro-spheres has been added into common SMC(Sheet Moulding Compound) to reduce the density, as well as the cost. Properties testing of SMC were conducted according to the National standards. Results showed that most of the indexes of the low density SMC are lower than that of common SMC with varying degrees of decline. Products were prepared by mould pressing. The weight of low density SMC product is decline by 17.3%. Some properties, such as medium resistance, vibration endurance, fatigue endurance, stiffness and strength, have been investigated in detail. Experimental and performance testing results showed that this kind of low density SMC is suitable for the automotive application.