An indoor Yagi antenna includes an antenna body, a PCB substrate and an antenna bracket. The antenna body includes an upper shell and a lower shell which form an inner cavity containing the PCB substrate including an end connected to a signal director, an end connected to a signal reflector, a middle section connected to a main antenna oscillator, the portions of the three which are electrically contacted with the PCB substrate respectively, are wrapped by the upper shell and the lower shell, the bottom surface of the lower shell is provided with a feed line terminal block connected to the PCB substrate; the antenna bracket includes a bracket rod that can be flexibly bent, the top end of the bracket rod is provided with a universal adjusting mechanism connected to the lower shell, and the bottom end of the bracket rod is provided with a bracket base.