The present disclosure relates to the technical field of detection and control for washing machines. Provided are a front-loading washing machine and an unbalance detection method and device thereof. The method comprises: when a drum operates at a low constant speed, detecting the torque of the drum and acquiring average torque values; when the roller operates at a constant acceleration speed, acquiring average torque values and a minimum value of the average torque values of the drum in real time; determining whether a difference between the average torque and the minimum value of the average torque values is greater than a preset unbalance threshold; and if the difference is greater than the preset unbalance threshold, determining that dynamic unbalance occurs on the drum; otherwise determining that no dynamic unbalance occurs on the drum. Accordingly, in the present disclosure, no sensor is needed for unbalance detection, so that cost and the detection difficulty are lowered, and damages to mechanical comp
