The present invention relates to a circuit resistance test wire connection clamp which comprises an adjustable clamp mechanism for connecting a contact surface. The adjustable clamp mechanism is provided with a steel wire rope. One end of the steel wire rope goes through a scalable insulation casing which is provided with a current wiring terminal and a voltage wiring terminal which are connected to the adjustable clamp mechanism. The insulation casing also is internally provided with a pawl mechanism which is connected to one end of the steel wire rope and is used for realizing the expansion locked adjustment of the insulation casing. The pawl mechanism is provided with an unlock mechanism. The structure of the wire connection clamp is compact, the clamping of the various shapes of contact surfaces is facilitated, and the clamping force and contact are good.