Research conclusions：(1)Safety risk control is an important content of supervision work．(2)The supervision company must take part in the practical process of technological innovation actively．(3)Key posts such as the chief supervision engineer and group leader of a section，must have rich experience，and the supervision company must hold regular training for the supervising engineers．(4)The matrix supervision organization is more suited to supervision of the mountainous high speed railway．(5)The domestic installation and work facilities of supervisors must accord with building a clean environment and the feature of mountain area．(6)Control the quMity of transition section strictly． (7)Strengthen the information construction，control the supervising condition and personnel position of every worksite strictly．(8)strengthen the environment supervision，control the sensitive worksites emphatically．(9)Adaptation to local conditions and innovation management is important guarantee to complete the supervision of mountainous high speed railway．