The invention belongs to the field of lamps, and in particular, discloses a table lamp with a warning function. A second lamp holder is arranged at the top end of a lamp cover, and is connected with a second bulb capable of emitting green light; the second bulb is coated with a special-shaped lamp cover; an illumination circuit is arranged in a base, and includes an accumulator for supplying electricity to the illumination circuit and a power supply wire for charging the accumulator; the accumulator is connected with a single-pole double-throw switch; the single-pole double-throw switch includes a throw cutter end, a first contact end and a second contact end; the throw cutter end is connected with a positive pole of the accumulator; the first contact end is connected with a first bulb; the second contact end is connected with the second bulb; the second bulb is connected with a thyristor; the thyristor is connected with a pickup; and the pickup can conduct with the thyristor through receiving a sound signal to lighten the second bulb. The table lamp can timely give an alarm to scare away thieves after people fall asleep.