Abstract: A photovoltaic interconnect wire includes a conductive base strip with grooves provided thereon, and the grooves are linear and/or curved strip-shaped grooves (3) arranged obliquely to a longitudinal direction of the conductive base strip. An inclination angle of 15° to 75° is present between each linear strip-shaped groove and the longitudinal direction of the conductive base strip, and between a tangent line of any point on the curve of a curved-shaped groove and the longitudinal direction of the conductive base strip. The photovoltaic soldering strip increases an output power of a solar cell assembly by increasing the total reflection proportion. It also ensures soldering fastness by adjusting flat regions of the base strip. Effective cross section loss of the conductive base strip is reduced by adjusting the angle of each groove, so as to minimize the confluence efficiency loss of the soldering strip.