The invention relates to an ocean wave shielding model of network signal transmission of a wireless sensor on the sea. The model is used for calculating corresponding change of signal transmission intensity affected by ocean wave shielding after the node height changes. Size of a shielding factor Xsigma error is determined based on the node height h. The invention comprises following steps of S1: determining the relation between the shielding factor error Xsigma and the node height h; S2: via weight series function weighing of link space shielding regions, calculating a relation function lambda between the shielding factor error Xsigma and the node height h; and S3: according to the relation function lambda between the e shielding factor error Xsigma and the node height h, obtaining the ocean wave shielding model of ellipsoid size weighing. According to the invention, the shielding factor error is determined based on the node height, so accuracy of signal transmission measurement in the wireless sensor network on the sea is effectively improved and positioning efficiency is increased.