Planting box with telescopic ceiling

The utility model relates to the technical field of planting boxes, in particular to a planting box with a telescopic ceiling, which comprises a lower planting component, an upper planting component, an adjusting screw rod and a supporting component, a water outlet pipe is arranged on the lower side of the lower planting component, the upper planting component comprises an outer sliding sleeve, a watering ring is arranged at the upper end of the outer side of the outer sliding sleeve, and a water outlet pipe is arranged at the lower end of the watering ring. A water inlet hole is formed in the position, located on the inner side of the watering ring, of the outer side of the outer sliding sleeve, the lower planting component comprises an inner sliding sleeve, a bottom plate is arranged on the lower side of the inner sliding sleeve, and a supporting rod is arranged on the lower side of the bottom plate. The lower planting component and the upper planting component stretch out and draw back through the adjustin