The present invention relates to a negative pressure device, comprising: a hollow needle assembly including: a hollow needle adaptor, the hollow needle adaptor has an axial through hole, a proximal connector, a distal connector and a flange between the proximal connector and the distal connector, and at least one hollow needle, each of the at least one hollow needle has a tip and an axial through hole and is in fluid communication with the proximal connector of the hollow needle adaptor； a host machine, the host machine comprises a control module and a vacuum pump； and an exhaust pipe, the exhaust pipe is in fluid communication with the host machine and the distal connector of the hollow needle adaptor.
