Stacking manipulator

The invention relates to the technical field of mechanical arms, in particular to a stacking mechanical arm which comprises a guide rail frame, supporting columns are fixedly connected to the corners of the bottom end of the guide rail frame, a driving assembly is slidably installed on the guide rail frame, a grabbing assembly is movably installed on the driving assembly, and the stacking mechanical arm further comprises connecting columns. The connecting column is movably installed at the bottom end of the supporting column, and a supporting plate is fixedly connected to the bottom wall of the connecting column. Through the arrangement of the adjusting mechanism and the universal wheels at the bottom end, a user can transfer the guide rail frame, goods can be conveniently stacked at different positions, after a reciprocating screw rod rotates clockwise along with a connecting gear, a first limiting plate can move downwards in a supporting column along with the reciprocating screw rod, and therefore the goods