The paper presents the development of a numerical thermal deformation model of two-pass pulsed arc GMA (Gas Metal Arc) welding of a thin-sheet welded joint made of EP718 alloy using the ANSYS package, considering the distribution of temperature fields from a consumable electrode during transverse vibrations. Experimental verification of the calculation results showed that the developed thermal deformation model of two-pass GMA welding makes it possible to predict the stress-strain state of a thin-sheet welded joint with an error of 10 %, sufficient for engineering calculations. Residual stresses von Mises after welding according in the weld does not exceed 840 MPa (0.8 σB). The thermal deformation model of two-pass GMA pulsed arc welding developed during research can be used to assess the stress-strain state of a welded structure of complex spatial geometry with a large number of welds.