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A small grading machine was developed, fabricated and evaluated technically and economically acts by using cylinder system of rod for grading system for crops such as Baladi eggplant variety be used in small horticultural holdings, small grading stations and small factories. Series of experiments were carried out to study effect of some parameters such as rotary speed of grading unit (0.31; 0.41; 0.59) m/sec and slope angle of grading unit (0.0; 1.0; 2.0; 3.0 deg.) on grading machine capacity (ton/h), grading efficiency (%), mechanical damage of eggplant (%), specific energy consumption (kW. h/ton) and total operation cost (LE / ton) to evaluate the grading prototype. The optimum results were obtained at rotary speed 0.41 m/sec and grading slope angle 2.0 degree. At above variables the grading efficiency recorded 84.6 %, damage index of 2.71%, specific energy consumption of 0.32 kW. h/ton and total productivity cost for one ton was 5.62 LE / ton for Baladi eggplant variety.