A method of manufacturing a probe, wherein said probe has a long cylindrical shape, comprising a probe head, a probe body at a rear end of the probe head, and a probe tail at a rear end of the probe body, said probe has a three-layer composite structure, wherein an outermost layer of the probe is an outer conductive shell, an innermost layer of the probe is an inner conductive rod, and an insulating layer is disposed between the outer conductive shell and the inner conductive rod, characterized that the method of manufacturing said probe comprising steps of: S1, manufacturing the outer conductive shell of said probe; S2, manufacturing the inner conductive rod of said probe; S3, performing a marking operation on the inner conductive rod manufactured in S2; S4, cleaning the inner conductive rod and the outer conductive shell obtained in the above step S3; S5, heating the inner conductive rod and the outer conductive shell in an oven after having been cleaned; S6, sheathing an insulating sleeve on the inner conductive rod obtained in S5; S7, fitting the inner conductive rod sheathed with the insulating sleeve inside the outer conductive shell; S8, mounting the outer conductive shell having the inner conductive rod therein obtained in S7 into an injection mold; S9, mounting the injection mold onto an injection molding machine, and adjusting the position and the opening and closing state of the injection mold to ensure smooth opening and closing of the injection mold; S10, cleaning the injection mold; S11, pre-heating the injection mold having been cleaned; S12, injection molding with an insulating material; S13, cleaning a semi-finished probe after the injection molding; S14, removing excess material of the outer conductive shell of the semi-finished probe obtained in S 13 to obtain a final shape of the probe; and S15, performing a comprehensive performance detection on the probe obtained in S14. S1, manufacturing the outer conductive shell of said probe; S2, manufacturing the inner conductive rod of said probe; S3, performing a marking operation on the inner conductive rod manufactured in S2; S4, cleaning the inner conductive rod and the outer conductive shell obtained in the above step S3; S5, heating the inner conductive rod and the outer conductive shell in an oven after having been cleaned; S6, sheathing an insulating sleeve on the inner conductive rod obtained in S5; S7, fitting the inner conductive rod sheathed with the insulating sleeve inside the outer conductive shell; S8, mounting the outer conductive shell having the inner conductive rod therein obtained in S7 into an injection mold; S9, mounting the injection mold onto an injection molding machine, and adjusting the position and the opening and closing state of the injection mold to ensure smooth opening and closing of the injection mold; S10, cleaning the injection mold; S11, pre-heating the injection mold having been cleaned; S12, injection molding with an insulating material; S13, cleaning a semi-finished probe after the injection molding; S14, removing excess material of the outer conductive shell of the semi-finished probe obtained in S 13 to obtain a final shape of the probe; and S15, performing a comprehensive performance detection on the probe obtained in S14.