Abstract: Under high-density oil-based drilling fluid working conditions in deep and complex formations, traditional solid-phase control equipment faces technical problems such as low solid-liquid separation efficiency, high liquid content in oil-based cuttings, and high environmental disposal pressure; and imported negative pressure screening equipment has high air supply requirements, high energy consumption and manufacturing costs, and is difficult to promote on a large scale, In view of above challenges, an electric micro-vibration negative pressure vibrating screen was developed. The vibrating screen replaced traditional pneumatic vibrators with a vibration motor to build an electric micro-vibration excitation system and integrated a negative pressure suction device, a circulating rotary screen, and an integrated screen cleaning and cuttings collection mechanism. By relying on the synergistic effect of micro-vibration and negative pressure, the solid-liquid separation effect under ultra-fine solid-phase conditions was strengthened, effectively reducing the operating energy consumption and on-site supporting costs of the equipment. By establishing the dynamic equation of the vibrating screen frame, the high-frequency and micro-amplitude vibration working mechanism of the equipment was clarified. Based on three-dimensional modeling and finite element simulation, fatigue analysis and modal analysis of the frame were conducted. The results show that the frame has no risk of resonance failure, and the structural fatigue strength can meet the requirements of long-term continuous on-site operations. Field tests of the electric micro-vibration negative pressure vibrating screen were conducted in two wells using oil-based drilling fluids. The detection results of separated cuttings show that the equipment can be adapted to ultra-fine screens with pore size below 50 μm. The processing capacity of high-density oil-based drilling fluids is no less than 10.6 L/s, and the volumetric liquid content of separated cuttings can be stably controlled within 30%. Compared with traditional screening equipment, the vibrating screen can effectively reduce drilling fluid loss and hazardous solid waste generation. It features outstanding energy saving, environmental protection, and working condition adaptability and can achieve the domestic substitution of imported negative pressure screening equipment. It provides a highly efficient and reliable new equipment for fine solid-phase control of high-density drilling fluids, possessing high engineering application and promotion value.