By using different annealing processes to anneal the pressure-measuring cylindrical copper cylinder, playing some static experiments on different copper cylinders, the difference of pressure measuring performance of copper cylinder was analyzed. Results show that, by using current annealing processes all can achieve the purpose of full softening the material of the copper cylinder and the deformation of copper is not significantly affected by the different temperatures. Some copper cylinders which use short holding time have poor linear sensitivity, but their measurement deviation is better than those which use longer holding time. So, in the actual production of copper, we should use shorter annealing time to improve their measuring accuracy.