Abstract: Base on the actuality of green produce make a price research, start form sufficient competition and information opening and mass data offered by the network. Put forward the reason of introduce the state space model of the ARIMA process, through the express of its state space model and Kalman filter relation for forecast, discuss the likelihood function and fresh interest means which based on state space model, probe into exact forecast means of the state space model of the ARIMA process.To develop green farm produce energetically, improve the income structure of farms, the produce of our country break the "green bulwark" of export, has active theoretic and realism meaning.