Aiming at the problems that the traditional Yagi antenna is too large to conform to other carriers and its relative bandwidth is very narrow, a broadband microstrip Yagi antenna is designed. The antenna utilizes a relatively simple feeding method to reduce the antenna size, and utilizes the additional parasitic patches, vibrator coupling branches and metallized holes to expand the bandwidth and improve the antenna impedance matching. The antenna is simulated, designed and optimized by using Ansoft High Frequency Structure Simulator(Ansoft HFSS), and the real antenna is tested. The simulation and test results show that the antenna Voltage Standing Wave Ratio(VSWR) is less than 2, the relative bandwidth is 31% and the gain is greater than 9 dB at 2.4 GHz in the range of 1.81 GHz to 2.57 GHz, which indicates that the proposed broadband microstrip Yagi antenna basically meets the design requirements.