A driving device for a thromboelastometer, wherein said device comprises a cup-clamping mechanism, and an up-down-driving mechanism, a rotationally-driving mechanism and a horizontally-driving mechanism that are connected to said cup-clamping mechanism, wherein said up-down-driving mechanism is used to drive said cup-clamping mechanism to move up and down in a first direction, said rotationally-driving mechanism is used to drive said cup-clamping mechanism to rotate in a second direction perpendicular to the first direction, said horizontally-driving mechanism is used to drive said cup-clamping mechanism to move horizontally in the second direction, said cup-clamping mechanism is cooperatively driven by said rotationally-driving mechanism, said horizontally-driving mechanism and said up-down-driving mechanism to clamp and unload a testing cup to each station of the thromboelastometer, wherein said cup-clamping mechanism includes a clamping assembly-mounting seat, a first driving source fixed on said clamping assembly-mounting seat, a clamping jaw assembly the driving device being characterised in that the said cup-clamping mechanism further comprises a resetting elastic member, said clamping jaw assembly includes two clamping arms (141, 142), the ends of the two clamping arms (141, 142) cross with each other, and the other ends form a clamping jaw, said driving device is configured such that the first driving source moves in a direction close to the clamping jaw assembly and drives the other end of the clamping jaw assembly to open after abutting onto the end crossing with the clamping jaw assembly, said resetting elastic member is connected with said clamping jaw assembly to drive the other end of said clamping jaw assembly to close and reset, and said first driving source matches with the resetting elastic member to drive said clamping jaw assembly to clamp or loosen the testing cup. wherein said up-down-driving mechanism is used to drive said cup-clamping mechanism to move up and down in a first direction, said rotationally-driving mechanism is used to drive said cup-clamping mechanism to rotate in a second direction perpendicular to the first direction, said horizontally-driving mechanism is used to drive said cup-clamping mechanism to move horizontally in the second direction, said cup-clamping mechanism is cooperatively driven by said rotationally-driving mechanism, said horizontally-driving mechanism and said up-down-driving mechanism to clamp and unload a testing cup to each station of the thromboelastometer, wherein said cup-clamping mechanism includes a clamping assembly-mounting seat, a first driving source fixed on said clamping assembly-mounting seat, a clamping jaw assembly the driving device being characterised in that the said cup-clamping mechanism further comprises a resetting elastic member, said clamping jaw assembly includes two clamping arms (141, 142), the ends of the two clamping arms (141, 142) cross with each other, and the other ends form a clamping jaw, said driving device is configured such that the first driving source moves in a direction close to the clamping jaw assembly and drives the other end of the clamping jaw assembly to open after abutting onto the end crossing with the clamping jaw assembly, said resetting elastic member is connected with said clamping jaw assembly to drive the other end of said clamping jaw assembly to close and reset, and said first driving source matches with the resetting elastic member to drive said clamping jaw assembly to clamp or loosen the testing cup.