The invention relates to the technical field of washing machines, and discloses a washing machine unbalanced loading indicating device, a washing machine and an unbalanced loading detection method. The washing machine unbalanced loading indicating device comprises a washing barrel and at least one pressure guide pipe fixed to the outer wall of the washing barrel, the pressure guide pipe is in a Ushape, and liquid is injected into the pressure guide pipe; the two ends of the pressure guide pipe are fixed to the upper part of the washing barrel separately, and the end of the pressure guide pipeis connected with an air chamber communicated with the interior of the pressure guide pipe; a sensor for detecting the air pressure is arranged in the air chamber. The washing machine comprises the washing machine unbalanced loading indicating device. The unbalanced loading detection method is applied to the washing machine. The washing machine unbalanced loading indicating device, the washing machine and the unbalanced loading detection method lower the noise generated by barrel collisions during water removing of the washing machine.