Protection mechanism and sampling trolley

The utility model relates to the technical field of sampling, in particular to a protection mechanism and a sampling trolley, which comprise a first protection component, a second protection component arranged in the first protection component and an adjusting component arranged on the second protection component, the adjusting part comprises a telescopic part and a pressing part arranged on the telescopic part, and the telescopic part is connected with the second protection part; the first protection component comprises a first protection plate, a placement groove formed in the first protection plate and a round hole formed in the side wall of the first protection plate, the second protection component is located in the placement groove, a sliding face is arranged on the round hole, and the pressing piece is arranged in the round hole; the overall height of the protection mechanism can be adjusted through the adjusting part, nuclear power plant chemical samples can be protected in the transportation process