High-pressure and low-pulse dual-piston tandem advection pump is made of stainless steel, which can achieve stable flow control without damper. The product adopts 32-bit embedded microprocessor with ARM7 core, electronic pressure fluctuation suppression technology, and high-precision DC servo motor, to realize the combinatorial analysis mode of isocratic, binary, quaternary gradient and micro-analysis, which is suitable for trace analysis in scientific research and special industries.