The utility model relates to the technical field of vegetable seedling culturing, in particular to a bio-reaction heat germination accelerating device which comprises a box body formed by a bottom surface and side surfaces; heat insulation layers are arranged on the bottom surface and the side surfaces; the bio-reaction heat germination accelerating device is characterized in that a heat-absorbing heat insulation layer is arranged above the box body; a bio-reaction heat generating layer, a heat uniform distributing layer and a germination accelerating layer are arranged in the box body in sequence from bottom to top; as the heat generated by biological compost is adopted as the heat source, the germination accelerating device is in accordance with the concept of low carbon and sustainable development; when the external temperature is about 4 DEG C, the internal temperature of a greenhouse is about 10 DEG C, the temperature of the germination accelerating layer of the box body can maintain 20-25 DEG C, therefore, cucumber seeds can germinate 1 to 1.5 cm high after receiving the germination accelerating in the germination accelerating layer for 3 to 4 days, namely the cucumber plants can be conveniently transferred to a cultivating nutrition bowl after 3 to 4 days; and the bio-reaction heat germination accelerating device is particularly applicable to the germination accelerating of cucumber, courgette, cowpea, string bean, kidney bean and other seeds.