A test tube rack for chemical experiments, comprising a test tube rack body (1), a placement plate (2) and a bottom plate (3), the placement plate (2) and the bottom plate (3) being respectively movably connected to the test tube rack body (1); the test tube rack body (1) comprises two opposingly arranged side plates, and opposing inner sides of the two side plates are provided with several placement plate mounting grooves (11) and bottom plate mounting grooves (12), the bottom plate mounting grooves (12) being located below the placement plate mounting grooves (11); several test tube holes (21) used for placing test tubes are arranged on the placement plate (2), and locking pieces used for locking the test tubes are mounted in the test tube holes (21); several blind holes (31) matching the bottoms of the test tubes are arranged on the bottom plate (3); the upper end of the test tube rack body (1) is provided with step posts (13), the lower end of the test tube rack body (1) is provided with step slots (14) matching the step posts (13), and two test tube rack bodies (1) can be vertically connected by means of the step posts (13) and the step slots (14). The test tube rack is suitable for placing test tubes of different lengths and different diameters, and multiple test tube racks can be vertically stacked to save storage space.
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