The invention provides an automatic testing method and system for radial mechanical properties of a cork base of a draught-beer barrel. According to the invention, a crossbeam is arranged at the port of the cork base and used as a conducting material for applied load; in testing, standard dynamic or static load force vertically acts on an assigned position of the crossbeam, and prescribed bending moment test load is accurately applied on the cork base so as to allow the cork base to undergo radial deviation; and the value of deflection of the far end of the crossbeam is acquired and used for measurement of radial deviation of the cork base. The automatic testing method and system provided by the invention can realize accurate positioning and clamping of a to-be-tested draught-beer barrel, automatic continuous loading of load and accurate measurement and storage of testing data, so disadvantages of conventional manual operation in testing of the radial mechanical properties of cork bases in factories are overcome, and testing efficiency and precision are improved.