The utility model belongs to lathe functional unit reliability test field relates to a rolling linear guide pair clamp reliability test device, this test bench by clamp workstation main part, clamp control structure part, load apply the part, clamp capability test subtotal automatic control part is constituteed, clamp control structure part control clamp make clamping down on of ware and loosen, axial load and inertia load under some simulation clamp operating conditions are applyed to load, clamp performance test section is applyed some cooperations with clamp control structure part, load and is carried out the detection of clamp confining force, response time detection and braking distance detection, this testing method includes under the clamp empty load that the primitive acts is experimental, clamp down on that the action is experimental under the clamp loading, clamp the loading experimental and clamp performance test testing of brake action down. The utility model discloses can realize moving to the clamp of different kinds, different model, most volumes, static load and carry out reliability test.