Now, there are few researches on the ability of social workers who work with drug addicts / drug users in China, and the sample size is small and the content is not deep enough.The existing studies suggest that the professional knowledge and ability of social workers who work with drug addicts / drug users are insufficient and the vocational training is not standardized. On the other hand, the ability of social workers who work with drug addicts / drug users workers is related to the effectiveness of anti-drug in communities. So the large sample survey will help to understand the current working status and working ability of social workers who work with drug addicts / drug users in China.The development of the standardized training programs for social workers who work with drug addicts / drug users can improve the professional knowledge and ability of anti-drug social workers, so as to better help community drug rehabilitation personnel and finally reduce the relapse rate.

Inclusion Criteria:

- aged between 20 and 65;no gender limitation;those who agree to participate in the study and sign the informed consent.

Exclusion Criteria:

- inability to use online training.