Mechanical equipment sorted by fruit weight plays an important role in the rural agricultural economic development market. According to the weight characteristics of the fruit, the key components of the automatic fruit weight sorting machine is designed, including the feeding module, the discharging module, the weighing module and the gripping mechanism module. The fruit is transported forward through the feed conveyor module to the weigh module for weighing. The weighing module converts the weight information of the fruit into an electrical signal and sends it to the control system to analyze and process the electrical signal information. Finally, the control system drives the gripping mechanism module to complete the fruit sorting by weight.