Occurrence and damages of mountain hazards, such as torrent, landslides and debris flow, have close relation to human activities in mountain area. Most of mountain hazards widely dispersed over China are of small scale scattering over 31 provinical administrative districts. The experience in Alps and southwest mountains of China shows that small scale hazards were controlled successfully by small scale civil engineerings, with their advantages of simple construction, a little budget and great effectiveness in controlling hazards. For these engineerings, local materials and cheap labour are usually available. In addition, they can be combined with bio-engineering easily. In 1995—1997, small scale civil engineerings were used to cotrol small landslides, debris flow gullies and torrent gullies successfully in the southwestern mountains. The problems concerned in the application to all mountains in China are related to the support of the government, a good design handbook, train for young engineers and combination between the hazards control and economy development in mountain area.