A process for preparing decolored concentrated fresh momordica grosvenori juice, comprising the following steps: saccharifying fresh momordica grosvenori → selecting and washing the momordica grosvenori → crushing → performing percolation extraction → performing disc-type centrifugation → performing micro-filtration clarification using a ceramic membrane of 0.45μm → performing molecular weight ultra-filtration separation → decoloring using a polyamide resin → decoloring using a decoloring resin → adjusting the pH value using a cationic resin → concentrating using a reverse osmosis membrane → removing residues using a granular activated carbon column → performing micro-filtration clarification using a ceramic membrane of 0.22μm → performing vacuum decompression and concentration so as to obtain an ointment → sterilizing → performing vacuum packaging → obtaining decolored concentrated fresh momordica grosvenori juice. Also provided is the decolored concentrated fresh momordica
