The main research work is as follows: 1. Analyzed the castor state in the screw press, palm oil millﾧ,using the theory of the plug flow theory, and solid plug respectively set up pushing and squeeze out the oil related mathematical model, related factors of affecting the transmission rate and the squeezing pressure are analyzed;The established mathematical model is utilized to extract the LK type oil press paragraphs of squeezing pressure curve.2. Design the related squeezing test apparatus, completed the castor oil pressure test, fitting the castor cake residual oil rate of empirical formula, the main factors influencing the residual oil rate was analyzed.3. The use of LK type of castor oil press a variety of working conditions of combination experiment, according to the formula to calculate the residual oil rate of LK chamber type oil press maximum squeeze pressure, draught fanﾧ，and the results are compared with the theoretical value.Analysis of the experimental value and theoretical value, the reasons for deviation.Through the analysis of the working principle of the screw press, has been clear about the machine material actual present state and theoretical calculation method of squeezing than at all levels, further discusses the screw press crushing ratio and its distribution theory calculation model of two kinds of method, and on this basis, based on the modern design theory and method to establish the crushing ratio and its distribution of two kinds of theoretical calculation model, which laid a foundation for subsequent research.Computing screw press compression ratio is the key to calculate the volume of a squeezer.Research of cylindrical root circle cross section of cylindrical squeezer volume calculation, the threaded corresponding central Angle M equal, M a cell.Because squeezer pushing surface of the existence of Angle and back Angle, the six outside surface of the cell, there are two flat surface, there are two cylindrical surface, there are two...