The microstructure and thermal formability of twin-roll cast 7075 alloy strips prepared with and without electrical pulse (EP) of 5 mm in thickness were investigated by hot tensile tests under the condition of deformation temperature of 250~350 °C and strain rate of 0.001~0.01 s^-1. The related EP current parameters are as follows: the single cycle pulse width is 0.005 s; the pulse peak current is 300 A. The results show that the EP current effectively promotes the grain refinement and the precipitate homogeneousness, because the electromagnetic oscillation enhances the solute mixing ability during solidification. Meanwhile, the rolling textures of face-centered cubic (fcc) 7075 Al strips have the {423}<144> orientation. After EP current modification, the orientation of 7075 Al strips is {421}<216>. The peak flow stress of the 7075 alloy strips prepared with EP current is about 1.1~1.3 times larger than that of the original 7075 alloy strips. The electron back-scattered diffraction analysis shows that EP current can effectively improve the preferred distribution of the grains by promoting the dynamic recrystallization. Furthermore, the hyperbolic sine equation and the constitutive model with Zener-Holloman parameter are established based on the analyses. Besides, according to the fracture morphology, the EP current is beneficial to improve the mechanical properties of 7075 alloys at elevated temperature. Finally, the processing maps are established and the proper hot working parameters are designed as the temperature range of 290~330 °C and the strain rate of 0.001~0.002 s^-1.