The invention provides terminal strip combinations and an assembly method of an electrical connector made by terminals. The electrical connector mainly comprises an insulation body and at least two rows of terminal strip combinations, wherein the terminal strip combinations comprise terminals and strips which are connected; the insulation body is provided with two rows of accommodation grooves which are arranged back and forth corresponding to the two rows of terminal strip combinations; each terminal is provided with a base which is bent upwards and forwards to extend for at least one elastic arm; each strip is provided with a plurality of guide strips in an extension way, and each guide strip is connected with the base of the corresponding terminal and bent to form at least one space; and at least a part of elastic arms of the rear row of the terminals are accommodated into a space of the adjacent guide strips of the front row. The structure of the invention can ensure that the elastic arm of each terminal is long enough and has better elasticity, and the base of each terminal is directly connected with each strip without bending, therefore, the contact accuracy of the base with an electronic component is improved, and the terminals can be arranged on the insulation body simply and conveniently and are effectively protected.