An oral-care sputum suction tube, the oral-care sputum suction tube comprising a housing, a water suction tube, a water intake tube, a toothbrush head, and a switch capable of controlling the flow of the water suction tube, wherein A. the water suction tube and the water intake tube are mounted in the housing, the toothbrush head is mounted at the distal end of the housing, and the switch is mounted in a switch mounting groove provided on a hand-held portion of the housing, wherein the switch comprises: a rolling wheel and a slope plate, wherein the water suction tube is mounted between the rolling wheel and the slope plate; the rolling wheel is configured to: when driven forward, decrease a gap between the rolling wheel and the slope plate to press the water suction tube to reduce a cross-sectional area of the water suction tube; and when driven backward, increase the gap between the rolling wheel and the slope plate to loosen a pressure on the water suction tube to increase the cross-sectional area of the water suction tube under an action of an elastic restoring force of the water suction tube; B. the distal end of the water suction tube is connected to a water suction tube distal-end inner port provided at the distal end of the housing, and the distal end of the water intake tube is connected to a water intake tube distal-end inner port provided at the distal end of the housing; and C. a water suction opening provided on the toothbrush head is corresponding to a water suction opening provided on the housing, and a water intake opening provided on the toothbrush head is corresponding to a water intake opening provided on the housing. A. the water suction tube and the water intake tube are mounted in the housing, the toothbrush head is mounted at the distal end of the housing, and the switch is mounted in a switch mounting groove provided on a hand-held portion of the housing, wherein the switch comprises: a rolling wheel and a slope plate, wherein the water suction tube is mounted between the rolling wheel and the slope plate; the rolling wheel is configured to: when driven forward, decrease a gap between the rolling wheel and the slope plate to press the water suction tube to reduce a cross-sectional area of the water suction tube; and when driven backward, increase the gap between the rolling wheel and the slope plate to loosen a pressure on the water suction tube to increase the cross-sectional area of the water suction tube under an action of an elastic restoring force of the water suction tube; a rolling wheel and a slope plate, wherein the water suction tube is mounted between the rolling wheel and the slope plate; the rolling wheel is configured to: when driven forward, decrease a gap between the rolling wheel and the slope plate to press the water suction tube to reduce a cross-sectional area of the water suction tube; and when driven backward, increase the gap between the rolling wheel and the slope plate to loosen a pressure on the water suction tube to increase the cross-sectional area of the water suction tube under an action of an elastic restoring force of the water suction tube; when driven forward, decrease a gap between the rolling wheel and the slope plate to press the water suction tube to reduce a cross-sectional area of the water suction tube; and when driven backward, increase the gap between the rolling wheel and the slope plate to loosen a pressure on the water suction tube to increase the cross-sectional area of the water suction tube under an action of an elastic restoring force of the water suction tube; B. the distal end of the water suction tube is connected to a water suction tube distal-end inner port provided at the distal end of the housing, and the distal end of the water intake tube is connected to a water intake tube distal-end inner port provided at the distal end of the housing; and C. a water suction opening provided on the toothbrush head is corresponding to a water suction opening provided on the housing, and a water intake opening provided on the toothbrush head is corresponding to a water intake opening provided on the housing.