Abstract: The facility for higher plant culture on orbit is used to investigate the growth phenomenon of higher plant in microgravity environment. It is carried on Chinese Tiangong-2 spacelab, and its objective is to establish controlled ecological life support system on space station or space base. The facility selects arabidopsis (long-day plant) and rice (short-day plant) as experimental samples. It is composed of the module of higher plant cultivation, the module of life guarantee, the module of real-time online detection, and the retrieved unit. The facility has functions such as higher plant cultivation for long period, starting biological experiment on orbit, real-time online observation and fluorescence detection, cyclic utilization of water, nutrition supply, the control and detection of simulating long-day and short-day periodic of sunlight, the control and measure of ambient temperature, adjusting of CO₂ concentration, removal of harmful gas, and specimen retrieved by astronaut etc.