The invention belongs to the technical field of a test device, and relates to a lead and conductor connection device of a strain gauge. The strain gauge is connected with two leads; the tail ends of the two leads are connected with arched soldering lugs; the backs of semitransparent cuboid gels are double sticky tapes; the tail ends of the semitransparent cuboid gels are connected with the arched soldering lugs; the upper half part of a fastening block is equipped with a threaded hole; the threaded hole is connected with a cup head cross-recess bolt; a conductor through hole is opened in the middle part of the fastening block; insulation paint is coated on the lower surface of the fastening block; the upper end of the fastening block is a circular fastening belt; the lower part of the fastening belt is an adhering sheet; the adhering sheet penetrates the fastening belt; the conductor at the outer side of each ring of spring sheet is winded on the spring sheet; one end of the spring sheet is clamped on a spring clamping shaft; the other end is located at the lower outlet of the conductor; the spring clamping slot is connected with an upper enclosure and a lower enclosure; and a triangular prism-shaped lock catch and a blocking shaft are mounted at the lower outlet of the conductor. The device is simple in structure, scientific and reliable in principle, flexible and convenient in operation and regulation mode and wide in application prospect.