Abstract: A pet grooming device comprises a housing, a blade assembly, a motor, a switch, a rechargeable battery module, a hair suction duct; the hair suction duct is detachably disposed on the upper housing, the hair suction duct has an air inlet corresponding to the blade assembly; the housing has two strip-shaped slots arranged at a right side and a left side of a top of the housing, the housing has two strip-shaped ribs; and the hair suction duct has two extensions at the front end of the hair suction duct; each extension has a sliding groove at the inner wall of the extensions. The present invention also discloses a vacuum cleaner with the pet grooming device. The pet grooming device of the present invention is simple and reasonable in structure design, and easy to operate, assemble and disassemble.