An interval adjusting structure for furniture sliding doors comprises an interval adjusting device. The interval adjusting device comprises a first support element and a second support element which are in sliding connection. An adjusting assembly is arranged between the first support element and the second support element and at least comprises a loosening and tightening part and an adjusting part. The first support element and the second support element are in loosening and tightening fit through the loosening and tightening part, after the first support element and the second support element are loosened, front-back and/or left-right relative position adjustment can be achieved through the adjusting part, and the first support element and the second support element are mutually locked through the loosening and tightening part after adjusting. Through the improvement on the above structure, the intervals between the multiple furniture sliding doors and the intervals between the furniture sliding doors and furniture cabinets can be adjusted, and the interval adjusting structure has the beneficial effects that the structure is simple and reasonable, safety and reliability are achieved, using is convenient, dismounting and mounting are fast, the application range is wide, universality is high, the manufacturing cost is low, the size is small, the service life is long, and connecting compactness of components is high; and practicability is high.