The utility model provides a reinforcing instrument formula scaffold bearing capacity's connecting piece, includes lower part regulation lead screw base, fixed base plate and upper portion fixed connector. Fixed base plate overlaps simultaneously on the lead screw of lead screw base is adjusted to four lower parts, and four pole setting lower parts that instrument formula scaffold is adjacent are overlapped respectively on the lead screw of lead screw base is adjusted to four lower parts. Upper portion fixed connector is including supporting roof, outer tube, interior sleeve pipe, limiting plate and upper portion connecting bolt. Four pole setting tops that instrument formula scaffold is adjacent are do not inserted in four outer tubes of upper portion fixed connector and are offseted with the limiting plate. When bearing the support body that expects much, need carry on the height control at some and setting up, use the utility model discloses the bearing capacity of improvement instrument formula scaffold that can be great can reach instrument formula scaffold required rigidity, stability simultaneously, uses flexibility easy and simple to handle, is applicable to and builds the platform that the load is big, the required precision is high.