The utility model relates to an electric energy harmonic monitoring remote alarm device of a 10-20kV transformer platform area, comprising a harmonic signal acquisition circuit, a harmonic signal judging circuit and an alarm communication circuit, wherein the output of the harmonic signal acquisition circuit is connected with the harmonic signal judging circuit, and the output of the harmonic signal judging circuit is connected with the alarm communication circuit; power supply harmonic signals are acquired from a distribution transformer platform area and are connected onto a distribution network intelligent control center or a mobile phone of an electrician by the alarm communication circuit; when the power supply generates harmonic wave in the running of a distribution transformer, the single acquisition circuit acquires a harmonic signal, the harmonic wave exceeds the standard really by the judging of a signal calculation and comparison circuit, the harmonic signal is transmitted to an alarm transmitting circuit for remote alarming immediately, and the on-duty personnel goes to the site for handling at once after obtaining alarm. An intelligent alarm device utilizes an advanced electronic technology to develop harmonic intelligent management in the running of the distribution transformer, shortens the handling time of accidents, improves the power supply amount, increases the benefits of enterprises and the society and simultaneously plays a role in actively promoting the development of the intelligent technology of the distribution system.