The invention relates to the technical field of vibration isolation, and discloses an assembling type vibration isolation barrier. The assembling type vibration isolation barrier comprises a pluralityof vibration isolation modules arranged in parallel along a horizontal direction, wherein the vibration isolation modules comprise a plurality of web parts which are overlapped along a vertical direction, and flange parts arranged on the top of the top web part; the web parts and the flange parts are all of a hollow structure; and two adjacent web parts are detachably connected. Since the web parts are detachably connected, the web parts and the flange parts can be manufactured as prefabricated members in advance in a workshop and can be connected and spliced in field to avoid field manufacture, so that field construction time for a vibration isolation barrier is shortened, and the cost of the vibration isolation barrier is lowered. Meanwhile, the web parts and the flange parts adopt thehollow structure, the hollow structure causes the vibration isolation barrier to form a cavity under a condition that the structural strength of the vibration isolation barrier is guaranteed, a vibration isolation effect is similar to an open trench vibration isolation barrier, and a vibration isolation effect is improved while stability is guaranteed.