The invention provides a linkage-type clamping device and a bearing seat conveyor, and belongs to the field of machining. The linkage-type clamping device comprises a first clamping system, a second clamping system and a driving system, wherein the two ends of a first connecting rod in the first clamping system are respectively hinged with a first active rod and a second connecting rod; the second connecting rod is fixedly connected with a first movable plate; a first sliding mechanism used for sliding of the second connecting rod and a first limiting mechanism are arranged on a first clamping part; the two ends of a third connecting rod in the second clamping system are respectively hinged with a second active rod and a fourth connecting rod; the fourth connecting rod is fixedly connected with a second movable plate; a second sliding mechanism used for sliding of the fourth connecting rod and a second limiting mechanism are arranged on a second clamping part; and a driving rod in the driving system is hinged with both the first active rod and a second active rod. By adoption of the linkage-type clamping device, a mold can be clamped and prevented from moving in a welding process. The bearing seat conveyor comprises the linkage-type clamping device. By adoption of the bearing seat conveyor, a bearing seat can be conveyed and fixed at one position for welding operation.