The invention discloses a built-in negative pressure type
breast pump, and the
breast pump comprises a suction device
assembly and a negative pressure source; the suction device
assembly comprises a milk storage
bottle, a milk suction cover and a connecting part, wherein the connecting part is provided with a first end, a second end and a third end which are communicated with the milk storage
bottle, the milk suction cover and the negative pressure source respectively; the
breast pump further comprises a negative
pressure regulator and a one-way milk channel. On the one hand, the negative
pressure regulator is internally arranged, the formed negative pressure regulation space is enlarged, the amount of milk sucked at a time is large, repeated milk sucking is not needed, and breast distending pain of a puerpera is rapidly relieved; on the other hand, negative pressure is kept in the feeding
bottle, the state that an infant sucks
breast milk is simulated, the effects of
massage and
lactation promotion are achieved, a puerpera feels comfortable and does not feel painful when using the feeding bottle, meanwhile, the milk sucking cavity is closed in the whole process, the problem that milk flows out when the puerpera sucks milk in a reclining mode or a
side lying mode is effectively solved, and the feeding bottle is particularly suitable for cesarean mothers.