Pressure-resistance low-resistance insulated plug and venous indwelling needle

The invention discloses a pressure-resistance low-resistance insulated plug and a venous indwelling needle. The pressure-resistance low-resistance insulated plug respectively comprises a rear end plug body, a middle plug body and a front end plug body in the a puncture direction, wherein the middle plug body is provided with a hollow passage; both sides of the middle plug body are respectively abutted against the rear end plug body and the front end plug body; at least the periphery of the front end plug body is in interference fit with the inner cavity wall of a catheter seat; after a puncture needle punctures, a gap is reserved between the periphery of the puncture needle and the inner wall of the hollow passage; and the puncture needle is in sealed tight matched connection with both the front end plug body and the rear end plug body. The middle plug body of the pressure-resistance low-resistance insulated plug adopts an interference fit matched connection mode and adopts an UV (ultraviolet) adhesive layer