An electric plug-in connector terminal structure includes a pin and a female terminal. The pin has an insulating sleeve. The insulating sleeve is disposed at a front end of the pin. The insulating sleeve has an annular guiding slope. The annular guiding slope expands from a root of the insulating sleeve. The female contact has a guiding slope. The guiding slope is disposed at a front end of the female terminal. The guiding slope is inclined. An inclination direction of the annular guiding slope is the same as an inclination direction of the guiding slope.