A production system of a water-absorbent core, comprising: a manufacturing mechanism and a slitting mechanism, the manufacturing mechanism comprising a transmission component, a conveying component, a supplying component, a feeding component, a vacuum adsorption device, and a hot air penetration device, wherein: the conveying component is configured to convey fluffy cotton to a starting end of the transmission component; the supplying component is configured to convey a mixture of fluff pulp and hot-melt fibers to the transmission component, the transmission component has a plurality of outlets, and the plurality of outlets are located in a middle portion of the transmission component; the feeding component is configured to convey a super absorbent polymer to the transmission component, the feeding component has a plurality of feeding ports, the plurality of feeding ports and the plurality of outlets are arranged alternately along a transmitting direction of the transmission component, and each feeding port is located between two of the outlets; the transmission component is configured to drive the mixture of the fluff pulp and the hot-melt fibers, the fluffy cotton, and the super absorbent polymer to move in the transmitting direction of the transmission component, such that the mixture of the fluff pulp and the hot-melt fibers, and the polymeric water-absorbent resin are laminated on the fluffy cotton to form a laminate, and the transmission component is further configured to convey the laminate into the hot air penetration device; the vacuum adsorption device is disposed adjacent to the transmission component, and a position of the vacuum adsorption device corresponds to a position of the plurality of outlets, such that the mixture of fluff pulp and hot-melt fibers can be absorbed on the transmission component; the hot air penetration device is disposed adjacent to a terminal end of the transmission component, and the hot air penetration device is configured to perform a hot air penetration treatment to the laminate; and the slitting mechanism comprises an ultrasonic cutting device configured to ultrasonically cut the laminate after the hot air penetration treatment and fuse the hot-melt fibers at a cut portion of the laminate. the conveying component is configured to convey fluffy cotton to a starting end of the transmission component; the supplying component is configured to convey a mixture of fluff pulp and hot-melt fibers to the transmission component, the transmission component has a plurality of outlets, and the plurality of outlets are located in a middle portion of the transmission component; the feeding component is configured to convey a super absorbent polymer to the transmission component, the feeding component has a plurality of feeding ports, the plurality of feeding ports and the plurality of outlets are arranged alternately along a transmitting direction of the transmission component, and each feeding port is located between two of the outlets; the transmission component is configured to drive the mixture of the fluff pulp and the hot-melt fibers, the fluffy cotton, and the super absorbent polymer to move in the transmitting direction of the transmission component, such that the mixture of the fluff pulp and the hot-melt fibers, and the polymeric water-absorbent resin are laminated on the fluffy cotton to form a laminate, and the transmission component is further configured to convey the laminate into the hot air penetration device; the vacuum adsorption device is disposed adjacent to the transmission component, and a position of the vacuum adsorption device corresponds to a position of the plurality of outlets, such that the mixture of fluff pulp and hot-melt fibers can be absorbed on the transmission component; the hot air penetration device is disposed adjacent to a terminal end of the transmission component, and the hot air penetration device is configured to perform a hot air penetration treatment to the laminate; and the slitting mechanism comprises an ultrasonic cutting device configured to ultrasonically cut the laminate after the hot air penetration treatment and fuse the hot-melt fibers at a cut portion of the laminate.