The practical application of the Complex Sequential Sampling Decision Technique has been restricted due to the lack of the End limiting Sequential Sampling Model. In this paper, based on the examination of the regression model of the pest population spatial pattern, the current domestic commonly used End limiting Sequential Sampling Model has been derived for testing the regression model, and it is used during the course of the Complex Sequential Analysis and Decision Making. It is shown through the living example analysis that, with the Complex Sequential Sampling Decision Technique, the sampling cost may be cut down by a big margin for the same bio population under the conditions of given degrees of accuracy ( D ) and confidence (t α) .