Abstract: A type of two-axis micro fluxgate sensor has been designed and fabricated.In order to measure X-and Y-axis weak magnetic fields at the same times,the magnetic core was designed to be square-ring shape which was twist with excitation and pick-up coils.The micro sensor was fabricated by MEMS technique,and 5μm thick Ni_0.8Fe_0.2（permalloy） film was micro-electroplated as magnetic core for the sensor.The size of the sensor is 7×7mm² with the 50μm width coil.The result shows that the sensor can be used to measure weak magnetic field.Therefore,it will be useful in various application such as military,medical,and space research.