Ni-Co-B coating is prepared on Cu-sheet using electro-deposition method. The effect of current density on the microstructure, hardness, wear resistance and corrosion resistance of the coating is examined by means of SEM, EDS, ICP-MS, microhardness tester, friction and wear tester and electrochemical workstation. The results demonstrate that, as the current density gradually increased from 1 A/dm² to 7 A/dm², the prepared coatings consist of a single face-centered cubic phase with Ni (111) preferred orientation, while the grain size decreases first and then increases. Furthermore, when coatings were made with the increasing current density within the range 1~7 A/dm², they present the following features: the content of Co and B gradually decreased; the thickness increased from 17.6 μm to 50.1 μm; the hardness increased from 780 HV_{100 g} to 852 HV_{100 g}; the free corrosion potential shifts positively in 3.5%NaCl solution, and among others, the one prepared with 5 A/dm², presents the smallest corrosion current density. By dry wear test in air, the friction coefficient and wear mass loss decreases first and then increases, whilst with the increasing applied load, their friction coefficient decreases but the wear mass loss increases, and the wear mechanism is mainly abrasive wear and fatigue wear. Accordingly, in 3.5%NaCl solution, their friction coefficient and wear mass loss decreases first and then increases and the increase of applied load results in that the friction coefficient increases first and then decreases but the wear mass loss increases, and the wear mechanism is mainly abrasive wear. The research shows that the increased current density is helpful to improve the microstructure, as well as enhance the hardness, abrasion resistance and corrosion resistance of the Ni-Co-B coating, which provides a reference for the development of alternative chromium plating technology.