Taking the data of R&D of listed Chinese high-tech enterprises, this paper finds out for the first time a threshold effect, based on the Static Threshold Estimation Model and the Revised Dynamic Adjustment Model, that the R&D intensity gets together and takes around dynamically with 3% of most Chinese high-tech enterprises. It can be seen from this paper that the R&D intensity of most Chinese high-tech enterprises were set to meet the basic requirement of the policy of qualification recognition for Chinese high-tech enterprises. Those companies set their R&D intensity to only get qualified, and then gain a variety of policy benefits, thus lacking of initiative to carry out a large number of R&D in innovation.