Measurement of electric field, especially pulsed electric field, plays an important role in EMC designing, EMP study and many other fields. These years, researchers all over the world have done much work about it. However, people paid more attention on the improvement of probes' electric circuit and signal transmission, ignoring configurations' influence on their performance while they may have negative influence on measuring result's inaccuracy or linearity. In this paper the influence is analyzed theoretically and simulated with CST EMS.