Aligning cross universal shaft component for mounting horizontal-tail steering engine

Disclosed is an aligning cross universal shaft component for mounting a horizontal-tail steering engine. The aligning cross universal shaft component is composed of a universal shaft (1) and an assembly shaft (2). The middle of the universal shaft (1) is provided with a round sliding ball (11), the two ends of the universal shaft (1) are cylindrical structures (12) with axes located on a same straight line, a through hole I (13) perpendicular to the cylindrical structures (12) is formed in the round sliding ball (11), the assembly shaft (2) is located in the through hole (13), each cylindrical structure (12) is axially and radially provided with through holes II (14) perpendicular to each other, a shaft is arranged in each axial through hole II (14), distance L between a central axis of each cylindrical structure (12) and a central axis of the through hole (13) in the vertical direction is 1-5mm. The end portions of the through hole (13) are provided with plugs (15). The aligning cross universal shaft compone