Abstract: Mechanical properties of cherry tomato fruits and its peduncles are vital basis in design and control of tomato harvesting robot.Test of compression from transversal and longitudinal directions for tomato fruit of different ripening phases,and test of breaking for cherry tomato stem were conducted.The results showed that the compressive capacity of cherry tomato fruits with different maturity was significantly different.The compression rupture of green fruit stage was the largest,the ripening stage was the smallest,and the whole fruit decreased with the ripening.The vertical and horizontal compressive strength of mature cherry tomato were quite different with obvious anisotropy.The longitudinal compressive capacity was greater than that of the vertical.When picking,the lateral pressure should be reduced to protect the fruit.During the ripening period,the breaking load at the expanding node of cherry tomato fruit stem was weak.When picking single fruit,it was suggested to break from the expanding node of cherry tomato fruit stem.When picking the whole bunch of fruit,it was recommended to pay attention to the mechanical weakness of the fruit stem.