A preserving method of growth factors derived from platelets, comprising the steps of: (a) obtaining a blood sample including platelets with growth factors contained therein to be preserved； (b) releasing the growth factors from the platelets； (c) filtering out the released growth factors； (d) preserving the filtered growth factors； whereby the growth factors are preserved for extended period of time.一種自血小板取得的生長因子的保存方法，包括以下步驟：(a)獲得包含血小板的血液樣品，所述血小板中含有待保存的生長因子；(b)自血小板中釋放生長因子；(c)過濾出已釋放的生長因子；(d)保存已過濾的生長因子；由此，所述生長因子的保存時間得以延長。
