Cap removal device, sample analyzer and cap removal control method

The invention discloses a cap removing device, a sample analyzer and a cap removing control method. The cap removing device acts on the test tube assembly, the test tube assembly comprises a test tube and a test tube cap used for sleeving the test tube, and the cap removing device comprises a clamping assembly, a tube jacking assembly and a cap removing assembly. The clamping assembly is used for clamping a test tube, the tube jacking assembly is arranged on one side of the clamping assembly and used for abutting against the test tube, and the cap removing assembly is arranged on the side, away from the tube jacking assembly, of the clamping assembly and used for separating a test tube cap from the test tube or sleeving the test tube with the test tube cap. Therefore, the test tube assembly is fixed through the cooperation of the clamping assembly and the tube jacking assembly, and the test tube cap is separated from the test tube or sleeved on the test tube through the cap removing assembly, so that the test