This work established strain-based forming limit diagrams (FLDs) for DP600 steel sheets by means of experimental investigation and theoretical prediction. The results showed that compared to the theoretical forming limit curve (FLC), predicted by Keeler equation, the theoretical FLCs predicted by the Hill’79 yield criterion, or the Logan-Hosford yield criterion, were more suitable for predicting the forming limit of DP600 steel sheets. Solutions from the analytical methods were compared to experimental FLD, established based on combining uniaxial tensile tests and hydraulic bulging tests, only with an error of 3 %, proving the rationality and accuracy of the theoretical prediction.