A kind of engagement device of solution strainer tool, it is suitable for connection one with the filter device of a silica gel plug, an and serum bottle, it and include one around ontology, the suction tube integrally connected what ontology and be connected to the accommodating space for going out an accommodating space, and one below integrally connected what ontology annular in shape, and with a formation what inner wall and the spiro connecting piece of threaded portion that is spirally connected for the serum bottle. The accommodating space has a upper opening and a under shed, and the silica gel plug of the filter device is so that the filter device is connected the what ontology from the upper opening close-fitting what of the accommodating space accommodating space. The engagement device of the solution strainer tool is able to connection opening and forms threaded serum bottle, and the design for the formula that is integrally formed, and is able to effectively reduce manufacturing cost.一種溶液過濾器具之接合裝置，適用於連接一具有一矽膠塞的過濾裝置，及一血清瓶，並包含一圍繞出一容置空間的本體、一個一體連接於該本體並與該容置空間連通的抽吸管，及一呈環狀一體連接於該本體下方，且具有一形成於內壁面並供該血清瓶螺接之螺紋部的螺接件。該容置空間具有一上開口，及一下開口，該過濾裝置的矽膠塞是自該容置空間的上開口緊配於該容置空間中，使該過濾裝置連接於該本體。該溶液過濾器具之接合裝置得以連接開口形成有螺紋的血清瓶，且為一體成型式的設計，得以有效減少製造成本。
