The utility model provides a welding position frock of resistance spot welding cross tensile sample, belongs to the welding technique field, and the purpose reduces the welding error of sample, and its technical scheme is, including locating plate and cross briquetting in the constitution, establish tangible on the locating plate and describe the cross constant head tank that is greater than the sample gross thickness with the solder joint cross tensile sample phase -match and the degree of depth, the tank bottom center of cross constant head tank is equipped with the lower electrode locating hole of lining up, the shape of cross briquetting and cross constant head tank phase -match and press in the cross constant head tank treat the welded specimen on, the center of cross briquetting is equipped with the last electrode locating hole of lining up. The utility model discloses utilize the cross constant head tank to advance line location to two strip shaped plates that constitute solder joint cross tensile sample, the utilization prevents a shaped plate changing of the relative positions with the cross briquetting of cross constant head tank gomphosis to two electrode tips that utilize two electrode locating pore pair spot welders advance line location, have improved the welding efficiency and the welding precision of sample greatly, thereby have improved the accuracy of experimental result.