In the multiple stream theory, there are three kinds of origins in the whole system, namely, problem stream, political stream and policy stream, which forms the window of problem at a key point of time. The problem stream of the nearby enrollment policy introduced on January, 2014 is manifested in the burden of school entrance exam, the occupied educational resource, the rent-seeking and corruption and the increase of school bus accidents. The political stream is the attention of the government and citizens. The policy stream is manifested in the steady reform and the proposals of experts and scholars. The change of nearby enrollment policy is the result of interactions among problem stream, political stream and policy stream.