The present invention provides a measurement method of electromagnetic parameters of an electromagnetic shielding fabric yarn overlapping region. The objective of the invention is to solve the problemthat the whole electromagnetic parameters of the electromagnetic shielding fabric cannot be accurately measured. The method comprises the steps of: building an overlapping yarn arrangement device totightly connect wrap yarns and weft yarns and tightly cover the wrap yarns and the weft yarns up and down; manufacturing an overlapping splicing piece; adjusting the thickness; manufacturing an inversion test sample: cutting the inversion test sample from the overlapping yarn arrangement device to form an overlapping region test sample, and employing two thickened slices with the same size to obtain the inversion test sample; and performing inversion calculation of the electromagnetic parameters: putting the inversion test sample into a transmission reflection method clamp for measurement, andcalculating electromagnetic parameters of the test sample in the overlapping region according to an inversion theory. The overlapping region splicing piece is manufactured to ingeniously design the inversion test sample to meet the demand of the clamp size, obtaining of electromagnetic parameters of the yarn overlapping region is achieved according to the test structure of the inversion test sample through combination of the inversion theory, and the measurement method of electromagnetic parameters of the electromagnetic shielding fabric yarn overlapping region lays the foundation of subsequent related research, product design and production and test evaluation.