Thread trimming structure for sewing machine

The thread trimming structure comprises a base, a sewing machine body, a thread take-up assembly and an automatic thread trimming assembly, the thread take-up assembly is arranged on the base, a supporting column is arranged on the sewing machine body, the sewing machine body is arranged on the base through the supporting column, and the automatic thread trimming assembly is arranged on the supporting column. The thread take-up assembly comprises a lead screw, a sliding block, a supporting plate and a thread take-up rod, a cavity is formed in the base, the cavity is communicated with the outside through a sliding groove, the lead screw is rotationally arranged in the cavity, the sliding block is arranged on the lead screw in a sliding and sleeving mode and arranged in the sliding groove in a sliding mode, the lead screw is meshed with the sliding block through threads, the supporting plate is arranged on the sliding block, and the thread take-up rod is arranged on the supporting plate. And the take-up lever i