The invention relates to the technical field of dyeing machines, in particular to a microfiber synthetic leather direct dyeing machine which comprises a machine body, a stirring system, a pigment adding system, a heating system and a drainage system. The machine body comprises a cylinder body in a rectangular box shape and a hollow machine head, a machine body cover plate is arranged at the top of the cylinder body, and a machine head cover plate is arranged at the top of the machine head. A middle separation plate is arranged in the cylinder body in the length direction and divides the interior of the cylinder body into two equal parts, inserting grooves are formed in the cylinder body and the middle separation plate at equal intervals, and inserting plates are inserted into the inserting grooves. Automatic heating, water adding, drainage, stirring and discharge devices, so that the work efficiency of equipment is greatly improved; the structure capable of changing the internal volume is arranged, therefore, the volume of the cylinder body can be changed according to needs, and water resources and consumed energy are saved.