This paper studies the soil stress on the holding sheet between the pile-anchor erecting columns of the pile-anchor holding block structure system often used in Chongqing. Based on the indoor model tests, this paper makes a qualitative analysis about the variation rules of the soil stress on the holding sheet. The results are compared with the calculation results on classical soil stress theory. Then, this paper suggests that the classical soil stress theory is unsuitable to calculating and analyzing the soil stress on the holding sheet.