Cleaning loss detection and material collection device of grain combine harvester

The invention provides a cleaning loss detecting and collecting device of a grain combine harvester, and relates to the technical field of grain combine harvesting. The cleaning loss detecting and collecting device of the grain combine harvester comprises a grain combine harvester body and a discharging pipe, the discharging pipe is installed on one side of the grain combine harvester body and used for discharging grains, and a first round rod is arranged on one side of the grain combine harvester body. According to the cleaning loss detecting and collecting device of the grain combine harvester, straw falls off along with the top of the reverse push rod after being rolled by the first rolling roller again, passes through the reverse push rod and then is discharged to the ground through the first inclined plate; by means of the structure, straw which is not thoroughly removed from grains can be thrown into the position between the first grinding roller and the second grinding roller again, the grains can be r