Cloth automatic edge aligning device of sewing machine

The invention relates to a cloth automatic edge aligning device of a sewing machine. The cloth automatic edge aligning device comprises a detecting mechanism and a regulating mechanism, wherein the detecting mechanism comprises a sensor assembly, a support frame of the sensing assembly is in an E shape and is arranged in a Y direction, three groups of sensors parting vertical arrangement are arranged on a PCB (printed circuit board) arranged at the middle layer, each sensor is a correlation type multipoint sensor, the pair of the upper and lower sensors arranged at the outer side of an E-shaped notch are primary positioning sensors, the two pairs of the upper and lower sensors arranged at the inner side of the E-shaped notch are precise positioning sensors, and the regulating mechanism is divided into an upper layer regulating mechanism and a lower layer regulating mechanism which are respectively used for regulating upper layer cloth and lower layer cloth. The cloth automatic edge aligning device of the sewing machine has the advantages that the edge aligning detection precision is high, the regulation precision is high, the structural design of the sensor assemblies is ingenious, the upper and lower layer cloth detecting efficiency is high, the edge aligning regulation resistance is small, the edge aligning regulating cloth contact area is large, the primary positioning sensors achieve the cloth pre-judgment effect, the cloth edge pressing incapability due to cloth monitoring incapability cannot occur even when the radian of a cloth piece is smaller, and the sewing quality is improved.