Trace coal sample automatic weighing device

The invention discloses a trace coal sample automatic weighing device which comprises a crucible, a sample feeding mechanism, a blanking mechanism and a weighing mechanism, wherein the crucible is used for containing a coal sample; the sample feeding mechanism is used for containing the crucible and conveying the crucible to a preset position along a first direction; the blanking mechanism is provided with a blanking port, and the blanking port corresponds to the preset position; the weighing mechanism corresponds to the blanking opening and is used for weighing the crucible; wherein a lifting mechanism is arranged in a second direction perpendicular to the first direction and is used for driving the sample feeding mechanism to move along the second direction, so that the crucible falls on the weighing mechanism for weighing. According to the invention, integration and automatic operation of crucible conveying, blanking and weighing are realized, and the device has the advantages of high efficiency, intellige