The invention relates to a reinforcing cage rapid assembling and positioning system, which comprises a drilling platform, a reinforcing cage main reinforcement, a reinforcing cage hoop, reinforcing cage main reinforcement connectors, a end fixing ring, a end fixing ring splicing plate, end fixing ring movable inserting plates, a end fixing ring movable inserting plate pin, a drilling pile steel sleeve, a packing block, an operation platform, an operation platform scaffold board and an operation platform safety cable. The system has the advantages that two hemicyclic steel rings are spliced into the end fixing ring, and the assembling labor intensity of the end fixing ring is reduced; a reinforcing cage in the lower layer is hung by adopting eight movable inserting plates uniformly arranged on the end fixing ring, thereby the expansion of the tip beating ring is easily realized; the main reinforcement connectors in the upper and in the lower layers can be simultaneously spliced by adopting a double layered platform; the whole system has the advantages of reasonable loading, high connector quality, high construction efficiency, low labor intensity, short pile-forming period and low construction cost, and is particularly applied to the rapid assembling of the long pile reinforcing cage with double layered main reinforcement and large diameter.