Portable continuous negative-pressure suction instrument

The invention discloses a portable continuous negative-pressure suction instrument, and relates to the technical field of medical equipment. The portable continuous negative-pressure suction instrument comprises an instrument box internally provided with a vacuum pump and a lithium battery pack. A circuit control mainboard is arranged on the top face of the instrument box, and the side face of the instrument box is provided with a negative-pressure outputting opening and a vacuum meter; the pressure of the vacuum pump is controlled by a negative-pressure adjusting key, the vacuum meter is connected to an outputting pipe of the vacuum pump, and a negative-pressure connector of the vacuum pump is communicated with a drainage bottle through a negative-pressure connecting pipe extending out of the negative-pressure outputting opening; a drainage pipe is connected to the drainage bottle; the circuit control mainboard is further provided with a charging opening, a charging indicating lamp and a working indicating l