The microstructure and texture in DP590 dual phase steel through different process were studied respectively by means of field emission scanning electron microscope （FESEM） and electron back-scatter diffraction （EBSD）. The results show that the microstructure have a large change from hot rolling and cold rolling to continuous annealing process; block ferrite and a spot of pearlite of hot rolled was transformed into ferrite and a spot of martensite， which grain size reduced from 8 micrometers to 6 micrometers. The texture also have a large change from hot rolling and cold rolling to continuous annealing process; rotated cube texture are weakened gradually， but its extent smaller， and the corresponding（001）<110> grains were reduced gradually; the disadvantageα texture enhanced first and then weakened， which the orientation density of the strongest component（112）<110> reach to biggest at cold rolling stage; and the corresponding（112）<110> grains increased first and then decreased; the advantageγ texture increased gradually， which the orientation density of the strongest component（111）<112> reach to biggest at continuous annealing stage， and（111）<110> and（111）<112> grains also increased gradually， but （111）<112> grains are more than（111）<110> grains.