The invention provides a method for assembling card holder connectors. The method comprises the following steps that: an insulating body and a plurality of conductive terminals are provided, wherein the insulating body is provided with a plurality of terminal holding holes and through grooves; the inside of each terminal holding hole is provided with a first space, a second space and a third space; the first space comprises a first wide space and a fist narrow space; each conductive terminal has a wide fixed part and a narrow fixed part; each wide fixed part extends downwards to form a weldedpart; the conductive terminals are pushed forwards to enter the terminal holding holes, so as to position the wide fixed parts respectively in the first wide spaces, position the narrow fixed parts respectively in the first narrow spaces and position the welded parts just above the through grooves; when the conductive terminals are pushed down, the narrow fixed parts fall to the second spaces, and the welded parts are positioned in the through holes and close to the back sides in the through holes; and the conductive terminals are pushed forwards till the welded parts push against the front sides in the through holes, so as to position the conductive terminals and ensure that the wide fixed parts enter the second spaces partially at least. The method for assembling card holder connectors does not damage the structure of the insulating body and is convenient for mechanized assembly.