Abstract: The influence of resistor thermal effect in flow measurement using micro solid state drag force wind sensor is researched in this paper.The wind velocity and simply wind front or back directions are obtained by measuring the strain of cantilever of the micro solid state drag force wind sensor.The strain is measured using platinum resistor made by sputtering.When wind blows over resistor the resistance of it will vary with the wind velocity because the thermal conduction,convection and radiation between environment and resistor.The output of sensor will decrease then increase when the variation of resistance caused by thermal effect and strain are different.Thus the results of measurement will be affected.In this paper two kinds of wind sensors the connection mode of the resistor of which are different are analyzed.The testing results of two kinds of sensors which are manufactured based on MEMS processes validate the results of analysis.