The paper tries to construct a standard research model for the growth of small and mediumsized technological enterprises under the angle of bionics. Using ecology theory to explain exterior growth characteristics of small and mediumsized technological enterprises, and using life cycle theory to explain its internal growth characteristic, this article constructs a growth mechanism model for small and mediumsized technological enterprises based on systems dynamics theory and method. The model demonstrates that a consummate growth mechanism should include external environment system feedback loop, own functional system feedback loop and correlation feedback loop between subsystems. Intriguing overlapping feedback loops builds up a growth functional net of small and mediumsized technological enterprises.