Micro pump extension pipe limiting device and micro pump

The embodiment of the utility model discloses a micro pump extension pipe limiting device and a micro pump. The micro pump extension pipe limiting device comprises a base, a clamping structure; and a height adjusting structure. The clamping and fixing structure comprises a first batten and a second batten which are oppositely arranged and an elastic piece located between the first batten and the second batten, the first batten is installed on the top of the base through the supporting column, and the second batten is installed on the side, away from the supporting column, of the first batten through the elastic piece; the stretching direction of the elastic piece is perpendicular to the plane where the first batten is located. The first batten and the second batten are the same in structure and comprise body parts and clamping ring parts fixed to the middles of the body parts in a combined mode. According to the extension pipe limiting device, the limiting ring part for fixing the extension pipe is formed between the clamping ring parts of the first strip plate and the second strip plate, the position of the second strip plate relative to the first strip plate is adjusted through stretching of the elastic piece, the extension pipes with different pipe diameters are fixed, and the applicability of the extension pipe limiting device is improved.