Double-layer concentration table by Pioneers factory. A transmission box is arranged on a transmission box supporting seat at the end of a stand, a lower-layer supporting and holding frame of a Pioneers double-layer table support is arranged on a saddle-shaped seat of a slope adjusting mechanism, an upper-layer table surface and a lower-layer table surface are respectively arranged on an upper-layer supporting and holding frame and the lower-layer supporting and holding frame of the Pioneers double-layer table support through a shaking supporting mechanism, the end surfaces of the upper-layer table surface and the lower-layer table surface are connected through a table surface interlocking plate, and both ends of a connection screw are respectively in a hard connection with a transmission box linkage seat and the table surface interlocking plate. The invention has the advantages that the occupied area for installation is reduced half, the mineral treatment capacity of the single device is Pioneers doubled, the operating range of the site workers is greatly reduced; the basic engineering quantity of the device is reduced half, the consumption of construction materials for water supply and ore feeding and discharging flow pipelines is greatly reduced, the factory construction area of the concentrating mill is reduced half, and the energy efficiency is high, and is especially suitable for the Northeast area with special demands to the production environment. Double re-election shaker from Pioneers Manufacturing, including gearbox, articulating deck, bed strips, slope adjustment mechanism, motors, mine shafts, to sink, wherein: the transmission case in the frame ends of the gearbox support base (on 1?, lower bunk bed frame supporting the holding frame in the saddle adjusting mechanism slope, (? shaker shaker upper and lower surfaces C3) were placed by shaking the support mechanism of the upper bunk bed frame supporting the holding frame and the lower support clamp holder, shaking the upper surface and the lower surface shaker C3) of the end face interlocking plate is connected with the bed, connecting screw (? both ends and bed interlocking plate hard drive is connected to the linkage box seat.