This paper proposes a jet electrochemical additive micro-manufacturing (Jet-ECμAM) process with confined electrolyte to enhance the shape precision of micro structures. To achieve electrolyte confinement, a layer of dichloromethane is dispersed on the cathode workpiece. When the electrolyte is ejected out of nozzle and reaches onto the workpiece, it does not disperse freely on the workpiece but its extent of spread is restricted by dichloromethane due to their different densities and immiscibility. Consequently, the electrochemical reaction is confined to the processing zone and the distribution of current density in the confined zone is improved at the same time, which enhances the shape precision. To further analyze this method, a multi-physical simulation was performed to investigate the electrolyte flow characteristics and electric field distribution on the workpiece. The results showed that after electrolyte flow out of the nozzle, its extent of spread is restricted by dichloromethane leading to confinement within the processing zone on the workpiece. Moreover, the distance of radial spread of electrolyte is reduced from 241 μm to 133 μm with the inter-electrode gap (IEG) increased from 100 μm to 400 μm. On the other hand, there is an increased current density in the confined region, and the distribution of current density becomes uniform at the same time. Experiments were conducted to verify the proposed technique. The results indicate that the shape precision of a micro structure is significantly improved with the proposed method. Micro-pillars with vertical side walls were well deposited, and a reduction in diameter from 580 μm to 380 μm was observed with the increasing IEG. In addition, the surface quality improves when the current density increases from 30 A/dm2 to 70 A/dm2. At last, by controlling the IEG and the motion path of the nozzle, different kinds of micro structures were well deposited, demonstrating a flexible fabrication process based on Jet-ECμAM.