The invention relates to a design method of a power transmission circuit board column foundation in clayed soil. The design method comprises the following steps: (S1) a buried depth and a bottom width in present calculation are determined; and a depth-to-width ratio of the foundation is calculated; (S2) the shear strength of the soil is calculated; and a limit value of the depth-to-width ratio of the foundation is further calculated; (S3) intermediate parameters alpha and beta are calculated based on the depth-to-width ratio of the foundation and the limit value of the depth-to-width ratio of the foundation, wherein the value of the intermediate parameter alpha is not higher than 1; (S4) destruction factors are calculated based on the parameter beta; (S5) the uplift bearing capacity is calculated based on the destruction factors, the shear strength of the soil, the area of a baseplate, the weight of the soil, the buried depth and self weight of the board column foundation; and (S6) the uplift bearing capacity and the uplift load are compared; and the finite element analysis is performed. The method is reliable and reasonable and accurate in calculation results, and improves the design safety and economy of the power transmission circuit board column foundation.