Buried nozzle telescopic assembly

The utility model discloses a buried nozzle telescopic assembly which comprises a first telescopic pipe, a second telescopic pipe, a third telescopic pipe and a fourth telescopic pipe. Positioning columns are arranged at the two ends of the first stretching part, the first stretching part penetrates through the first telescopic pipe, and one end of the bottom of the first stretching part extends to the bottom of the first telescopic pipe; the second telescopic pipe is arranged on the outer side of the first telescopic pipe in a sleeving manner; the third telescopic pipe is arranged on the outer side of the second telescopic pipe in a sleeving manner; and the second stretching piece is arranged around the outer wall of the third telescopic pipe. The telescopic pipe can be automatically stretched and reset after irrigation is stopped, the reset speed is high through the arrangement of internal and external dual elastic stretching reset, it is guaranteed that stress is uniform in the whole reset process, and the