Automatic size discharge system for spinning machine platform

An automatic size discharge system for a spinning machine platform relates to the technical field of size discharge procedures in the spinning production process. The automatic size discharge system comprises at least one high-pressure size mixing barrel, at least two normal-pressure size storage barrels, and a size pump, wherein the high-pressure size barrel is connected with each normal-pressure size storage barrel in parallel through a pipe; an on/off valve is respectively arranged on the inlet end and the outlet end of each normal-pressure size storage barrel; the other end of the on/off valve on the outlet end of each normal-pressure size storage barrel is connected with the size pump through a pipe; and the other end of the size pump is connected with each platform. The automatic size discharge system can integrate all of the size mixing procedures so as to save space and reduce the number of size-mixing operators, and can conveniently discharge size only by controlling each on/off valve and the size pump, thereby saving time and manpower and greatly lowering the labor intensity. In addition, residual size can be saved by optional adjustment, and available size liquid remaining in one platform can be fed to other platforms, thereby saving material cost.