Abstract: This paper uses the panel threshold model to empirically analyze the technology spillovers effect obtained through import trade channels and tests the effect of different levels of intellectual property protection in the process, finding that intellectual property protection has played a significant double threshold effect in the technology spillovers of import trade, and when intellectual property protection has exceeded some threshold value, the trade technology spillovers had a greater promoting effect on enterprise innovation performance in our country. Therefore,our country should reasonably design and use the resources of intellectual property protection according to market preferences.

Key words: intellectual property rights, trade, Threshold Effect, technology spillover