The invention discloses a method for testing the crosslinking degree of a POE glue film of a photovoltaic module. The method comprises the following steps that S1, a xylene extraction solution is prepared; S2, the PVE glue film of the photovoltaic component is cut to serve as a test sample, and the mass of the test sample is weighed as W1; S3, the weighed test sample is placed in a sample bottle,the xylene extraction solution is added into the sample bottle, and the sample bottle is sealed and transferred to a drying box for heating extraction, wherein the volume-to-mass ratio of the xylene extraction solution to the test sample is equal to or greater than 60:1, and the extraction temperature is set to be 60-80 DEG C; S4, after extraction is completed, the test sample is taken out from the sample bottle and dried, and the mass of the test sample after the extraction is weighed as W2; S5, according to a formula that D is equal to W2/W1*100%, the crosslinking degree of the PVE glue filmof the PV module is obtained through calculation. Traditional testing methods are discarded, the crosslinking degree testing temperature is changed from the boiling temperature of xylene to low temperature for a test, and the effect of secondary crosslinking is avoided; reflux of a xylene liquid in the low temperature test is no longer needed, testing processes are simplified at the same time, and time is saved.