The invention discloses a vehicle-mounted trash can and relates to the technical field of trash cans. The vehicle-mounted trash can comprises a bearing box, wherein a first trash box and a second trash box are respectively arranged in an inner cavity of the bearing box, the first trash box and the second trash box respectively penetrate through the right side and the left side of the bearing box,and sliding stripes are fixedly connected to the front sides and the back sides of the first trash box and the second trash box. The vehicle-mounted trash can convenient to use solves the problem thata vehicle-mounted trash can has inconvenience in front-back seat use by a structural design of the first trash box, the second trash body, the sliding stripes, a fixed plate, a first clamping connection device, a pressing plate, a second spring, a first movable block, a second sliding block, a first movable rod, a second movable rod, a first clamping connection block, a third sliding block, a second clamping connection device, a handle, a second movable block, a second clamping connection block, a fourth sliding block, a third spring, a movable groove, a partition plate, a first spring and afirst sliding block.