Objective: To compare the knowledge and behavior toward hearing protection among workers in different workplaces and investigate its influence factors. Methods: 2 manufacturing companies with obvious noise hazard in workplace were selected into the study. Health management level was distinguished through field investigation and verification. Questionnaire focus on basic knowledge of hearing health, acceptance level of noise hazard, comfort of wearing hearing protectors and atmosphere in workplace was designed and was used to investigate the knowledge and behavior toward hearing protection. Results: Hearing protectors that meet the level of protection are distributed throughout the workplaces. Although company A has a lower noise hazards level, the health management system was poorly executed. The proportion of workers persisting in wearing hearing protectors throughout the work shift in company A was lower than B (P<0.01) . Workers in company A intended to underestimate the noise level (P<0.01) and the health effect of hearing loss (P<0.01) . All the workers were worry about suffering from hearing loss (P>0.05) , but those in company B had more positive attitude toward the protection of hearing protector (P<0.01) and relied on the protector (P<0.01) . The awareness of protection, in turn, help workers adapt attitude and get used to wearing hearing protectors consciously in workplace (P<0.01) . Conclusion Health management performance play a key role in help workers form good knowledge and behavior. To protect workplace health, employers need to creative a healthy supportive environment for workers.