Abstract: The fundamentals of exterior orientation elements calculation by orientation images method and EFP(equivalent frame photo) method are reviewed briefly.And so far,none of aerial triangulation with three-line array CCD image and ground control points can pass through the similarity(no count of image observational error) between real model and the model estimated by single strip adjustment computed with the help of four control points at the corners of the strip is indicated.Based on the aerial triangulation by EFP method,the reason of the presented problem is studied deeply.The addition of connected point(s) between neighbor EFP is proposed,and meanwhile,the ground coordinates of connected points located in the first and last baselengths of the strip are given or either of connected point coordinates in the left or right EFP is true.With the alternative control,the adjustment results can almost make the model calculated by single strip adjustment similar with real model.And several final statistical results of adjustment using computer simulated data are listed.