A dry filter, comprising: a barrel ; a first end cover and a second end cover , sealing two ends of the barrel respectively; a first filter layer , provided at an end, close to the first end cover , in the barrel ; and a dry layer , provided in the barrel and located at a side, away from the first end cover , of the first filter layer , the dry layer comprising a first filter plate close to the first filter layer and a second filter plate away from the first filter layer , the first filter plate , the second filter plate and a barrel wall of the barrel forming a dry chamber, the dry filter further comprising a first fixing structure and a second filter layer , the first fixing structure defining the position of the second filter plate in the barrel , such that a buffer chamber is formed between the second filter plate , an inner wall of the barrel and the second end cover , and the second filter layer being located in the buffer chamber , characterized in that the first fixing structure comprises: a first bottom plate , abutting against the second end cover , a first overflowing hole being provided on the first bottom plate ; and a plurality of first clamping jaws , provided on the first bottom plate , a first accommodating space for accommodating the second filter layer being formed between the first clamping jaws , wherein an end, away from the second end cover , of each first clamping jaw abutting against the second filter plate . a barrel ; a first end cover and a second end cover , sealing two ends of the barrel respectively; a first filter layer , provided at an end, close to the first end cover , in the barrel ; and a dry layer , provided in the barrel and located at a side, away from the first end cover , of the first filter layer , the dry layer comprising a first filter plate close to the first filter layer and a second filter plate away from the first filter layer , the first filter plate , the second filter plate and a barrel wall of the barrel forming a dry chamber, the dry filter further comprising a first fixing structure and a second filter layer , the first fixing structure defining the position of the second filter plate in the barrel , such that a buffer chamber is formed between the second filter plate , an inner wall of the barrel and the second end cover , and the second filter layer being located in the buffer chamber , characterized in that the first fixing structure comprises: a first bottom plate , abutting against the second end cover , a first overflowing hole being provided on the first bottom plate ; and a plurality of first clamping jaws , provided on the first bottom plate , a first accommodating space for accommodating the second filter layer being formed between the first clamping jaws , wherein an end, away from the second end cover , of each first clamping jaw abutting against the second filter plate . a first bottom plate , abutting against the second end cover , a first overflowing hole being provided on the first bottom plate ; and a plurality of first clamping jaws , provided on the first bottom plate , a first accommodating space for accommodating the second filter layer being formed between the first clamping jaws , wherein an end, away from the second end cover , of each first clamping jaw abutting against the second filter plate . <EOS>