The invention provides a ladder-shaped wind beam wind-distribution plate of a circulating fluidized bed gasifier. A labyrinth of vent holes of the wind-distribution plate is set, and air outlet ends of the vent holes are converged to a same macropore channel; a column-shaped hole is formed in the upper part of the wind-distribution plate, and a hollow circular truncated cone which is smaller at the upper part and bigger at the lower part is arranged at the lower part of the wind-distribution plate; the upper edge of the circular truncated cone is connected with the edge of the lower end of an air-material mixture through hole; the circular truncated cone is set as a sealing cap; the bottom of the air-material mixture through hole is a plane and is set as a material blocking table; the plurality of vent holes are formed between a spherical crown arch face of the lower bottom surface of the wind-distribution plate and the air-material mixture through hole; the lower sections of the vent holes are arranged to be inclined upwards in a divergent way, the middle sections of the vent holes are vertically arranged, and the upper sections of the vent holes are horizontally arranged. The ladder-shaped wind beam wind-distribution plate has the advantages of being exquisite in design, long in service life and concentrated in airflow, having gradient change, being free from leakage of ash, and the like.