Parallel moving mechanism with changeable platform

A parallel moving mechanism with a changeable platform comprises a lower platform A, an upper platform B, a first branch chain (I), a second branch chain (II) and a third branch chain (III). One end of the first branch chain (I) is fixedly connected with a top point B1 of the upper platform B through a pin, the other end of the first branch chain (I) is fixedly connected with a top point A1 of the lower platform A through a pin, one end of the second branch chain (II) is fixedly connected with a top point B2 of the upper platform B through a pin, the other end of the second branch chain (II) is fixedly connected with a top point A2 of the lower platform A through a pin, one end of the third branch chain (III) is fixedly connected with a top point B1 of the upper platform B through a pin, and the other end of the third branch chain (III) is fixedly connected with a top point A3 of the lower platform A through a pin. Large-scope space deformation and movement are achieved through rotation of three branch chains and scaling of the lower platform A and the upper platform B.