The invention discloses a biological tray temporary treatment system. The biological tray temporary treatment system comprises a homogenizing tank group, a sludge storage tank, an aeration tank and aside edge precipitation tank. Sewage is introduced to the temporary system during technology reconstruction of the biological tray temporary treatment system, is treated, and is discharged after reaching standards, so standard improvement and grading are realized without changing the integral layout of a sewage treatment plant and affecting the normal the normal running state of the sewage treatment plant, and a problem that a new sewage treatment plant has to be established due to super load running and low discharge standards of original sewage treatment plants is solved. The temporary treatment system is pulled out after original tank technology reconstruction is completed to carry out technology reconstruction on the original technology in normal running state of the sewage treatment plant. The system occupies a small area, all tanks are modular and movable, and the system is widely suitable for the environmental protection industry.