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Abstract With the fluidity of innovation resources and knowledge enhancing increasingly, a staged breakthrough from independent innovation to collaborative innovation is happened in the equipment manufacturing industry. And collaborative innovation network become the main form in equipment manufacturing industry innovation. With the cooperative patent data of manufacturing industry in Heilongjiang from 1985 to 2017, this paper explores the evolution of collaborative innovation network structure of the equipment manufacturing industry. Result shows that: ①the enterprises are the main innovative subjects which shows a characteristic of "stateowned enterprises withdraw and privateowned enterprises advance", and the status of private enterprises in collaborative innovation network rise rapidly. Even though the status of stateowned enterprises decline, they are still the key nodes in collaborative innovation network. Also, the colleges and research institutes are the important practitioners and linkers. ② There exists hierarchy and structural hole phenomenon in collaborative innovation network, and the colleges, stateowned enterprises and major cities occupies the hole location.③collaborative innovation status of urban scale and provincial scale decline, and national scale become the most important collaborative innovations spatial carrier. Thus, the less developed areas should expand the innovation space scale and innovation field, and give play to the role of enterprise innovation main body and technology of a goalkeeper. Then, it's necessary to construct the innovation market systems which are conducive to the innovation resources flowing and innovative cooperation. And establishing the innovation community and industryuniversityresearch "innovation triangle" are also needed.
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