A multifunctional suction irrigator includes a handle (1) and a tube portion (2), where an end portion of one end of the tube portion (2) is provided with a suction and irrigation channel (3) and a lighting channel (4), a tail portion of the handle (1) is provided with a negative pressure joint (5) and an irrigation joint (6), an irrigation tip and a negative pressure suction tip are installed in the suction and irrigation channel (3), the negative pressure suction tip is in communication with the negative pressure joint (5) through a negative pressure tube (7), and the irrigation tip is in communication with the irrigation joint (6) through an irrigation tube (8); a roller-type negative pressure volume controller (11) for controlling a negative pressure value of the negative pressure tube (7) and a roller-type irrigation volume controller (12) for controlling an irrigation volume of the irrigation tube (8) are installed on the handle (1); and an LED floodlight (9) is installed in the lighting channel (4), and electrically connected to a battery (13) installed in the handle (1) by using a conducting wire (10), and a push-button switch for controlling on/off of the LED floodlight (9) is installed on the handle (1). The multifunctional suction irrigator is convenient and labor-saving in operation, simple in structure, and convenient in use.