Currently, apparent resistivity observation used in the earthquake prediction of China has been facing two serious difficulties. One is the sparsely and unevenly distributed networks, and the other is the susceptibility to environmental disturbances. One of the possible causes to the difficulties is the large-electrode spacing presently used at stations. In this paper, we will take an analysis on the feasibility of short-electrode spacing well measurement by the use of apparent resistivity analytical expression and finite element numerical method. Results display that the disturbance from surface electric anomalous bodies and annual variation effects can be well inhibited by the use of short-electrode spacing well measurement. And the new type of measurement can record anomalies associated with earthquake as effective as surface large spacing measurement and large spacing well measurement. Short-electrode spacing well measurement greatly reduce the covering areas needed, and can be helpful to field network observation. Therefore, it provides an alternative scheme to settle the difficulties current observations face.