Catheter base of venous indwelling needle

The utility model discloses a catheter base of a venous indwelling needle. A needle cannula of the venous indwelling needle is inserted into the catheter base. The catheter base is composed of a front portion, a rear portion and a puncture portion which are spliced into a whole. A cavity of the puncture portion is provided with a silica gel plug and a positioning plug with a central hole for the needle cannula to penetrate through. The silica gel plug is spliced by two silica gel members. The spliced portion between a first silica gel member and a second silica gel member is provided with a lubrication chamber. The lubrication chamber is filled with lubricating oil and arranged on the insertion path of the needle cannula. According to the catheter base of the venous indwelling needle, the splice type silica gel plug is used for preventing the entire indwelling needle from being brought out by too much force for needle withdrawal after puncturing, and meanwhile, the separation plug is provided with the lubrication chamber filled with silicone oil for achieving smooth insertion and withdrawal of the needle cannula and the surplus filled silica gel can press a needle hole for sealing.