Counter weight type surface resistance tester

The utility model relates to the field of resistance testers, in particular to a heavy hammer type surface resistance tester, which comprises a main machine and two heavy hammers made of metal materials, the two heavy hammers are connected with the main machine through wires, and winding mechanisms are arranged on the two heavy hammers. The winding mechanism comprises a wire spool, a spring and a steel ball; an annular groove is formed in the middle of the two heavy hammer heads, an inner ring of a wire spool is rotationally connected into the annular groove, and a plurality of clamping grooves are formed in the side wall in the annular groove; a plurality of spring grooves are formed in the inner ring of the wire spool, the steel balls are connected to groove openings of the spring grooves through springs, part of the steel balls are clamped into the clamping grooves, when resistance testing is conducted on materials with different areas, the wires are wound or released by rotating the wire spool, so that th