The invention provides a kneeing assembly on a sewing machine, and belongs to the technical field of machines. The kneeing assembly solves the problem that an existing mechanical kneeing assembly is not high enough in automation degree. The kneeing assembly on the sewing machine comprises a kneeing plate, a rotary block opposite to the kneeing plate, a kneeing connection rod connected between the kneeing plate and the rotary block. The kneeing plate is connected to the outer side of the lower end of the kneeing connection rod. The upper end of the kneeing connection rod is bent and is connected with the rotary block. The kneeing assembly further comprises a support and a Hall sensor, the support can be fixed to the bottom of a table plate of the sewing machine, the Hall sensor is fixed to the support, the rotary block is located on one side of the support, a rotary shaft penetrates through the support and is connected with the rotary block, a linkage rod is connected to the rotary shaft, and the linkage rod is fixedly provided with magnetic steel matched with the Hall sensor. The kneeing assembly has the advantages of being higher in automation degree, simpler in overall structure of the sewing machine and the like.