The invention discloses a low-resistance welding apparatus for a thin-strip conductor. The low-resistance welding apparatus comprises a heating table, a pressure table, a controller and an upper computer, wherein the controller and the upper computer are used for monitoring and controlling the welding temperature of the heating table and the applying pressure of the pressure table in real time, programming and setting an automatic welding program, and performing accurate welding and control; the heating table and the pressure table are used for providing high temperatures for melting a soldering flux and providing pressure for realizing uniform distribution of the soldering flux respectively; the heating table is an automatically-controlled electronic heating apparatus, and heats the pressure table through conduction; the pressure table mainly comprises the five parts of a driving motor, a guiding rod, a bracket, an upper pressing block and a lower pressing block; a welding sample is put between the upper pressing block and the lower pressing block; after the upper pressing block is laminated to the lower pressing block, the sample is compressed tightly; the laminated surface of the upper pressing block and the lower pressing block is machined precisely, and the depth of parallelism and perpendicularity of the surface are less than 5[mu]m/100mm.