The invention relates to a draw water tunnel quality online imaging quick detection device. At least three central strengthening rods are arranged along the circumferential direction of the outer wall of a detector sealing bin; a panoramic camera and strobe lamps are arranged in a light transmission cavity; an ultrasonic transmitting receiving transducer is located in a sound transmission cavity; the output rotation shaft of a first stepping motor passes through the shell front end of the detector sealing bin, enters the sound transmission cavity and is fixedly connected with the ultrasonic transmitting receiving transducer; the first motor control signal output end of a processor is connected with the control end of the first stepping motor; the ultrasonic control and ultrasonic receiving communication end of the processor is connected with the communication end of the ultrasonic transmitting receiving transducer; the video signal input end of the processor is connected with the video signal output end of the panoramic camera; and the three-dimensional attitude signal input end of the processor is connected with the signal output end of a three-dimensional attitude sensor. The draw water tunnel can be detected automatically and quickly in a condition of not interrupting operation of the draw water tunnel.