This work aims to study the effect of sintering temperatures on the compressive strength and weight of net paste concrete.The compressive strength and quality variety of concrete which undergo different sintering temperatures (400℃、 600℃、 800℃、 900℃) and sintered at different times (1h, 2h) are studied through experiments and theoretical analysis.By using XRD explore the inner of sample chemical composition and further obtain the mechanism about sample of weight loss and strength loss.Experiments indicate that the higher sintering temperature and the longer sintering time, the more loss of compressive strength and weight.