The utility model belongs to the technical field of hospital equipment. The utility model discloses a prompting and blocking device for a magnetic resonance examination room. An isolation layer is fixedly connected to the inner wall of the body; a switch button is embedded in the center of one side surface; a blocking pipe is arranged at the inwards-concave position of the body, the other side face of the body is fixedly connected with a connecting plate, a detecting device is embedded in the middle of the left end of the connecting plate, the control device, the storage battery and the motorare all arranged in the body, and the rotating shaft end of the motor penetrates through the body and is fixedly connected with the blocking pipe through a gear. Through cooperative use of the switchbutton, the blocking tube, the detection device, the control device, the storage battery and the motor, the blocking tube is automatically closed after a patient enters and exits, subsequent blockingof the patient is blocked in time, and normal examination work is prevented from being affected; the device is light in weight, is adhered to a wall body through super glue, and cannot damage the wallbody; the length of the blocking pipe can be manually adjusted so that the blocking pipe can be used for doors with different widths.