The invention provides a loudspeaker cabinet. The loudspeaker cabinet includes a bottom cover, a top cover, a side plate, a sounding monomer, a cyclic convex wall and a ventilating separator, whereinthe side plate connects the bottom cover and the top cover, so as to form accommodation space through enclosure, together with the bottom cover and the top cover; a front cavity is formed through enclosure of the sounding monomer, the top cover and the side plate together; a back cavity is formed through enclosure of the sounding monomer, the bottom cover and the slide plate together; the convex wall is extended to the direction, far away from the outer wall of the side plate, from the inner wall of the side plate in a convex manner; the ventilating separator is fixedly supported at one side,close to the top cover, of the convex wall, and separates the back cavity into a first back cavity and a second back cavity, together with the convex wall, and the first back cavity and the second back cavity are mutually communicated in air; the sounding monomer is arranged in the first back cavity; acoustic-absorbing particles are filled in the second back cavity; and the ventilating separator packages the acoustic-absorbing particles in the second back cavity. Compared with the related technologies, the loudspeaker cabinet has better low frequency acoustic performance.