The invention relates to a fixing device for a low temperature metal hose used for conveying liquid gas. The fixing device comprises a base plate, vertical columns, support flanges and locking keys, wherein four vertical columns are arranged and are welded on the base plate in a rectangular form; two support flanges are arranged; one support flange is welded between two vertical columns; the other support flange is welded between the other two vertical columns; the two support flanges are arranged in parallel at same altitude; hose storage rings used for storing the low temperature metal hose are arranged at the upper end of the support flanges; key holes through which the locking keys can penetrate are formed in the vertical columns; two locking keys are arranged; each of the locking keys penetrates through the key holes in two vertical columns and then is located above the support flanges; the locking keys are parallel to the plane where the support flange main bodies are located; the locking keys and the hose storage rings are used for fixing and limiting the low temperature metal hose. Compared with the prior art, the fixing device has the advantages of simple structure, convenience in operation and better fixing effect for the low temperature metal hose.