The invention discloses a casting insecticide tablet which comprises the following raw materials in parts by weight: 2-10 parts of an insecticide, 10-95 parts of sand, 7-15 parts of talcum powder, 5-30 parts of pregelatinized starch, 1-10 parts of sodium hydroxymethyl cellulose, 5-12 parts of microcrystalline cellulose and 0.5-1.5 parts of a preservative. The casting insecticide tablet has large capacity, is not easy to lose, has the advantages of small application amount, good sustained release effect, high utilization rate and long-lasting effect, effectively reduces the insecticidal cost, and simultaneously reduces the environmental pollution.