The invention relates to a calcium supplement health food and a preparation method thereof. Primary raw materials of the calcium supplement health food comprise 10-20wt% of a calcium-containing compound, 10-30wt% of , 5-20wt% of an edible fungus extract, 5-20wt% of a tremella extract, 5-20wt% of pearl powder and 0.1-0.5wt% of vitamin D3, and 0-35wt% of auxiliary materials allowed in health foods can be added in the health food to prepare a tablet, a soft capsule, a capsule or a granule, wherein the calcium-containing compound is one of or a combination containing above two of calcium citrate malate, calcium lactate, L-calcium aspartate, calcium gluconate and calcium citrate. The calcium supplement health food has the advantages of natural components, scientific burdening, safety, no toxic side effect, high calcium content and high bioavailability, and is a good novel calcium supplement agent.