Abstract: By spotweld tearing tests (lap-shear tension, coach-peel tension and KS-Ⅱ tension), the collision failure mechanical response of DP590 high-strength steel spotweld under different stress conditions was studied. The spotweld modeling method was proposed by considering bending moment transmission and welding heat-affected zone. With the CrachFEM material model of DP590 steel and by the benchmarking of the spotweld tearing test results and simulation, the correction coefficients of the CrachFEM material model for the heat-affected zone were obtained. The simulation was verified by three-point bending crush tests of the subsystem. The results show that all the spotweld samples were torn in the heat-affected zone. The force-displacement curve obtained by the subsystem test was in good agreement with the simulation, and the relative error of the failure load obtained by the simulation and the test was below 1%, indicating that the proposed spotweld failure simulation method could accurately predict the collision failure behavior of DP590 high-strength steel spotweld.