Rock stratum sampling and screening device

The utility model discloses a rock stratum sampling and screening device which comprises a sampling vehicle body and a vehicle body support arranged on the sampling vehicle body, an electric guide rail is arranged on the bottom face of the top of the vehicle body support, and a sampling driving motor with the driving end arranged downwards is arranged on the electric guide rail in a sliding mode. The driving end of the sampling driving motor is connected with a vertically arranged electric cylinder, the piston rod end of the electric cylinder is connected with a sampling drill bit, a roller screening mechanism for cleaning and screening rocks is arranged on the sampling vehicle body on the side of the sampling drill bit, and a sample storage box is arranged below the output port of the roller screening mechanism. According to the utility model, the sampled rocks can be screened and cleaned through the roller screening mechanism, so that the sampled rocks can be directly detected, and the sampling detection ef