The survey and progress about the study applying mechanics to traditional botany are summarized. It gives brief analysis to the influence of plant growth and development under the mechanics factors, such as mechanical vibration, strong sound wave (or ultrasonic wave), electromagnetic field and microgravity, et al. In other word, the biological effects of plant caused by environmental stress stimulation are set out (They contain positive effects and negative effects). Furthermore, the profound biological effects and some possible mechanism of the plant tissue and cell are discussed. The paper put forward several main problems about botanical mechanics which must be researched at the beginning of 21st century, and the more significant thing about it is the operation of Ca 2+ which as a Second Messenger, will be probed into. At the end of the paper, the well development tendency and practical prospect of the newly compound subject _botanical mechanics is also presented.