To solve the problem of abnormally high yield strength in 980 MPa dual-phase steel produced by a hot-dip galvanizing production line, the influences of different heating rates on the microstructure and properties were studied by spectral analyzer, scanning electron microscope, tensile testing machine and other methods. The results show that the addition of Nb and Ti indirectly changes the strengthening mode of the phase transformation structure. Nb+Ti content in the steel coil with higher yield strength is  0.01% higher than that of normal steel coil, and the heating rate is also 0.5 ℃·s-1 higher than that of normal steel coil. The increasing of heating rate leads to an increase in the degree of austenitization in the steel plate, and more martensitic structure is formed during the cooling process. The proportion of martensitic structure in the matrix is increased by about 5% compared to normal steel coil, resulting in an increasing of about 100 MPa in yield strength. By controlling the content of Nb+Ti added to the steel coil and limiting the heating rate, the heating rate is reduced from 2.0 ℃·s-1 to 1.5 ℃·s-1, and the proportion of martensitic structure in the matrix is reduced from around 24% to 19%. As a result, the yield strength for a large number of 980 MPa dual-phase steel coils reaches the expected range of 700-850 MPa.