A manufacturing method for a rod member of a three-dimensional statically indeterminate truss structure is provided, which includes the following steps. A first conical connection element is provided, which has a guide slot and a coupling portion on a front and a rear end respectively. A first screw connection is made to penetrate from the coupling portion of the first conical connection element, such that a screw portion of the first screw connection penetrates out of the guide slot, and a head portion of the first screw connection is confined within the first conical connection element. The coupling portion of the first conical connection element is aligned and engaged with a first end opening of a tube member, and the first end opening of the tube member is joined to an engaging portion in the coupling portion of the first conical connection element by applying a magnetic pulse welding technique.