The invention relates to a device for measuring the frictional force between an oil nozzle and a needle valve, and the device is characterized in that the device comprises a force sensor, a support, a vibration test bench, and a needle valve clamping tool; the top surface of the vibration test bench is provided with the needle valve clamping tool; the needle valve clamping tool is used for clamping the needle valve; the upper end of the needle valve is in cup joint with the oil nozzle; the upper end of the oil nozzle is rigidly connected with the force sensor; the force sensor is disposed at the bottom of the support; the height of the support can be adjusted so as to enable the reading, caused by gravity, of the force sensor to be zero; the vibration test bench drives the needle valve to move up and down, so as to simulate the movement state of the needle valve of an oil injector in an actual work process; the force sensor measures the frictional force between the needle valve and the oil nozzle. The device is simple in structure, and employs the vibration test bench to simulate the movement state of the needle valve, so as to measure the frictional force between the needle valve and the oil nozzle, and provide more accurate boundary conditions for the subsequent design and development of the oil injector, simulation and calculation, and characteristic research of fuel oil.