Currently, heatings by oil-bath and oven are major methods used in domestic for packaging industry to test the shrinkage ratio of plastic films, but the shrinking force and contracting force is less measured. The common shrinkage testing standards were introduced with focuses on the testing methods of shrinking force and contracting force in ISO 14616 and DIN 53369. LDPE, PETG, OPS, POF and BOPP were tested using method of ISO 14616. The results showed that ISO 14616 is available for the measurement of shrinkage properties of polyethylene, ethylene copolymers, and their mixtures as well as other heat-shrinkable films.