Two-step step stool

A two-step step stool, comprising a primary stool and a secondary stool, wherein the primary stool comprises a primary supporting plate and a primary pedal hinged with a top of the primary supporting plate;

• the secondary stool comprises a secondary supporting plate and a secondary pedal hinged with a top of the secondary supporting plate;
• the secondary pedal is higher than the primary pedal;
• a middle plate is arranged between the primary stool and the secondary stool and the middle plate is respectively hinged with the primary pedal and the secondary pedal;
• and a linkage mechanism configured to fold the primary stool and the secondary stool synchronously is arranged between the primary stool and the secondary stool;
• wherein the linkage mechanism comprises a first connecting rod arranged between the primary supporting plate and the middle plate and a second connecting rod arranged between the secondary supporting plate and the middle plate, wherein the first connecting rod and the second connecting rod are linked;
• wherein a third connecting rod and a fourth connecting rod are arranged between the first connecting rod and the second connecting rod, wherein the third connecting rod and the fourth connecting rod are hinged with each other;
• and the third connecting rod and the fourth connecting rod enable the first connecting rod to act to synchronously drive the second connecting rod to act.