The invention relates to a 
system and a method for 
cantilever beam heavy-duty test of a self-elevating drilling platform. The 
system comprises a main boat body, a 
cantilever beam, a drilling platform, a derrick, a 
top drive and a water ballasting type 
barge, wherein the main boat body is supported by 
pile legs and positioned above the 
sea level, the 
cantilever beam is horizontally positioned on the main boat body and extends above the 
sea level, the drilling platform and the derrick are positioned at the end part of the cantilever beam, the 
top drive is positioned at the top of the derrick, and the water ballasting type 
barge is connected with the 
top drive and floats on the 
sea level; a stand zone simulating 
actual weight is arranged on the drilling platform; and the top drive is connected with the 
barge through a steel 
wire rope. Three tests are carried out by using the 
system. The system and the method have the advantages that the correct implementation of the test scheme can be ensured, and at the same time, the test cycle can be shortened; and through the universalization of 
tool design, the system and the method can adapt to the cantilever beam heavy-duty tests of various self-elevating drilling platforms, thereby reducing cost.