Objectives: Substance abuse treatments are gradually replacing incarceration with multiple, longitudinal treatment arrangements in Taiwan. Few studies have been conducted on how substance abusers are guided in rebuilding social support networks during recovery. The purpose of this study was to investigate social support network implications of services for recovery in nonprofit residential treatment centers. Methods: This study adopted a qualitative research design, and conducted three focus-group interviews with 13 living care assistants, social workers and directors from 8 residential centers. The interview data were converted into transcripts for analysis with Nvivo12. Results: The social support network implications of services for recovery include four dimensions: rebuilding new connections with people in the centers, reframing original connections with family members, extending outside connections with people outside the centers, and enhancing collaboration of peer workers and professional workers. Conclusions: It is recommended that residential treatment centers increase resources on services of social support network for abstinence. Peer support services are valuable in the service model. Specific services for female substance abusers and their families are needed in the treatment procedures. Policy should evaluate the subsidy requirements linked to education level to encourage people with recovery experiences to remain as peer workers.