The utility model discloses a telescopic protective fence and a paste filling hydraulic support, which are applied to the technical field of underground mining and filling, and comprise a base
assembly, a plurality of base supporting ribs and a base guide plate, the base
assembly comprises a base bottom plate, a base quick
insertion plate, a plurality of base supporting ribs and a plurality of base guide plates, and the base quick
insertion plate can be connected with a quick
insertion groove of a rear filling device in a matched manner; the telescopic mechanism comprises a plurality of telescopic supporting ribs and telescopic limiting plates connected between the telescopic supporting ribs, a sliding groove is formed in the middle of each telescopic supporting rib, the telescopic supporting ribs are connected with the base supporting ribs in a sliding mode, and the base guide plates are located in the sliding grooves; and the
locking mechanism is installed on the telescopic mechanism or the base
assembly, and the
locking mechanism can lock the telescopic limiting plate when the telescopic limiting plate moves to the position corresponding to the base guide plate. According to the telescopic protective fence, the height of the telescopic mechanism can be conveniently adjusted, and the telescopic protective fence is matched with the height of a front hydraulic support; the safety of rear workers is effectively guaranteed, operation is convenient, and applicability is good.