The invention relates to the technical field of battery monitoring, in particular to a battery pack thermal buckling monitoring device and an electric vehicle. The battery pack thermal buckling monitoring device comprises a battery voltage detection chip, a calculator, a comparator and a vehicle control unit that are electrically connected sequentially, wherein the battery voltage detection chip is used for acquiring voltage of battery monomers every other preset time; the calculator is used for calculating differential pressure values according to the acquired voltage of the battery monomers; the comparator is used for comparing the differential pressure values with a preset threshold, and if the differential pressure values exceed the preset threshold, a failure electrical signal is output to the vehicle control unit; and the vehicle control unit cuts off a battery circuit after receiving the failure electrical signal. The battery pack thermal buckling monitoring device acquires the voltage of the battery monomers through the battery voltage detection chip, the battery voltage detection chip can detect the voltage of the battery monomers more precisely and can also monitor battery voltage more precisely, so that the detection precision is higher, and the probability of detection errors is reduced.