The invention provides an indoor common dynamic testing platform and method for electromagnetic waxing prevention of an oil well. The platform comprises a constant-temperature water bath box and a frequency-conversion electromagnetic field excitation source, wherein the constant-temperature water bath box is internally provided with two experiment boxes; circulating pumps are arranged at two sides outside the constant-temperature water bath box; the two circulating pumps are electrically connected with frequency converters respectively; outlets of the two circulating pumps are communicated with lower-end inlets of the two experiment boxes; upper-end inlets of the two circulating pumps are communicated with corresponding upper-end outlets of the two experiment boxes respectively; an inductor is connected with a pipeline on which the outlet of one experiment box is communicated with the inlet of the corresponding circulating pump; the frequency-conversion electromagnetic field excitation source is connected with the inductor. According to the platform provided by the invention, an electromagnetic waxing prevention condition of the oil well under a field dynamic environment can be accurately simulated indoors in a safe and environment-friendly manner; dynamic experiments are carried out on relative parameters optimized by a static experiment; testing results are compared and a present situation of a production technology in the aspect of waxing of the oil well is known; an influence rule of temperature, flow speeds and the like on an electromagnetic waxing prevention effect is obtained.