Disclosed are a puncture guider (02, 2) and a puncture guiding system, wherein a puncture channel (80) automatically adapted to the diameter of a puncture needle (03) can be realized in the puncture guider (02, 2). The puncture guider (02, 2) is used for connecting to a puncture support, and the puncture guider (02, 2) includes a depth block (21) and a push plate (22), wherein the depth block (21) includes: a connection structure for being connected to the puncture support, and a first guiding wall (211) and a second guiding wall (212), which are connected to each other and form an included angle； and the push plate (22) includes: a needle groove plate (222), and a self-adaptive component. A first end face (2221) of the needle groove plate (222), and the first guiding wall (211) and the second guiding wall (212) enclose the puncture channel (80), and under the action of the self-adaptive component, displacement can occur between the first end face (2221) of the needle groove plate (222) and the first guiding wall (211) and the second guiding wall (212), such that the puncture channel (80) can change automatically according to the specification of the puncture needle (03), so that same can automatically adapt to the puncture needles (03) with different needle diameter specifications. The puncture guiding system comprises the puncture support and the puncture guider (02, 2).L'invention concerne un guide de ponction (02, 2) et un système de guidage de ponction, un canal de ponction (80) adapté automatiquement au diamètre d'une aiguille de ponction (03) pouvant être réalisé dans le guide de ponction (02, 2). Le guide de ponction (02, 2) est utilisé pour être relié à un support de ponction, et le guide de ponction (02, 2) comprend un bloc de profondeur (21) et une plaque de poussée (22), le bloc de profondeur (21) comprenant : une structure de connexion destinée à être reliée au support de ponction, et une première paroi de guidage (211) et une seconde paroi de guidage (
