The invention discloses a bottom driving type laboratory flotation machine. The bottom driving type laboratory flotation machine is characterized by comprising a floatation tank, a bubble generating system, a material and slurry mixing system and a foam recovering system, wherein the floatation tank is arranged above the base and the upper end of the floatation tank is of an open structure; the bubble generating system comprises an inflating pump arranged inside the base, an annular air chamber arranged at the bottom of the floatation tank as well as a connecting pipe connected between an air outlet of the inflating pump and an air inlet of the annular air chamber; the material and slurry mixing system comprises stirring impellers which are positioned at the bottom of the floatation tank and are driven by a stirring shaft and a stirring and driving mechanism which is arranged in the base and is used for driving the driving shaft; and the foam recovering system comprises three scrapers and an overflow groove; the three scrapers are arranged at the upper part of the floatation tank, are uniformly arranged in a 60-degree form and are synchronously driven by a scraper motor; and the overflow groove is formed around the outer side of a top outer edge port of the floatation tank and is of an annular structure. The bottom driving type laboratory flotation machine disclosed by the invention can be used for mineral separation of a laboratory and also can be used for shooting a flow field and bubbles in the floatation tank of the laboratory.