The invention discloses a mouth care toothbrush with a water spraying function. The mouth care toothbrush with the water spraying function comprises a water supplying part and a washing part, whereinthe water supplying part comprises a water tank, a water pump which is connected to the water tank, and a power supply module which is connected to the power input end of the water pump; the washing part comprises a hose which is connected to the output end of the water pump, a handle which is connected to the hose, and a toothbrush head which is connected to the handle; the toothbrush head comprises a toothbrush head body, an empty cavity which is arranged in the toothbrush head body, hair which is fixed to the working surface of the toothbrush head body, and through holes formed in the toothbrush head body. According to the mouth care toothbrush with the water spraying function, tooth brushing and flushing are combined; teeth can be flushed through water after tooth brushing, and thus toothpaste and residues in slits between the teeth can be removed; the teeth can be directly flushed to remove food residue after meals. Therefore, the good cleaning effect is achieved; and the mouth iskept clean.