The invention provides a preparation method for a nickel/nitrogen-mixed carbon microsphere combined hydrogen evolution electrode. The main steps include that firstly glucose or sucrose serve as a carbon source, ethidene diamine serves as a nitrogen source, nitrogen-mixed carbon microspheres with different sizes and different surface characteristics are prepared and obtained by adjusting and controlling the hydrothermal time and the concentration of the carbon source; the nitrogen-mixed carbon microspheres and sulphamate bath are combined, a nickel / nitrogen-mixed carbon microsphere combined hydrogen evolution electrode with a relative large surface area and the ultrahigh catalytic activity is prepared through a simple electro-deposition method; and a foamed nickel substrate after being subjected to ultrasonic and acidizing treatment serves as an electro-deposition cathode, and a three-dimensional skeleton structure provides a relative large surface area for the combined electrode. The prepared nickel / nitrogen-mixed carbon microsphere combined hydrogen evolution electrode has the unique structure, the large surface area and the excellent and stable catalytic hydrogen evolution property.