Disposable lucifugal syringe

A disposable lucifugal syringe comprises a protection cap, an injection needle, a needle seat, a piston, a core bar and an syringe casing, wherein the piston is sleeved at the top end of the core bar which is sleeved in the syringe casing, the needle seat is arranged at the top end of the syringe casing, the injection needle is positioned on the needle seat, and the protection cap is covered on the injection needle. The disposable lucifugal syringe is characterized in that the needle seat and the syringe casing are both composed of an inner layer and an outer layer, inner layers are made of an ordinary medical polyvinyl chloride (PVC) material, and outer layers are made of a lucifugal material. The surface of an ordinary syringe is coated with a layer of lucifugal material, thereby resolving the problem that in existing lucifugal injection whether liquid medicine dissolves out to react cannot be distinguished. The disposable lucifugal syringe has the advantages of being simple in structure, convenient to operate, low in cost and the like, thereby having good economic benefit and being suitable for wide popularization and application.