The invention provides a solid particle refueling device and a flow field measuring device, relates to the field of high pressure particle refueling in PIV test technology. The solid particle refueling device comprises an air source system, an air pressure regulator, a mist particle generator and a refueling pipe. The air source system is connected to the mist particle generator and used for providing the power for mist particles. The air pressure regulator is connected to the air source system and used for regulating and maintaining the stability of the air source pressure put into the mist particle generator by the air source system. One end of the refueling pipe is connected to the mist particle generator, and the other end of the refueling pipe is communicated with a test area, and used for refueling the mist particles in the mist particle generator to the test area. A solid particle refueling device is adjustable in pressure, and uniform and stable in particle size. The invention also provides the flow field measuring device. The flow field measuring device comprises the solid particle refueling device, can refuel trapping particles to the test area with different pressure grades; the operation is simple and the measurement is accurate.