Large-scale launching box guide rail assembling tool and guide rail assembling method

The invention relates to the technical field of guide rail assembling, and provides a large-scale launching box guide rail assembling tool. The large-scale launching box guide rail assembling tool comprises a vertical main beam, wherein a main beam adjusting device used for adjusting the length of the main beam is arranged on the main beam; a cross arm perpendicular to the main beam is further arranged on the main beam; and a cross arm adjusting device used for adjusting the length of the cross arm is arranged on the cross arm. The assembling tool is of an assembling type structure, is light,convenient to mount and dismount, and high in assembling efficiency; the assembling tool has positioning and pressurizing functions, and can provide pressure needed by bonding of a bonding agent whileprecisely positioning a guide rail; and the invention further provides a guide rail assembling method. The assembling method can effectively guarantee assembling precision of the launching box guiderail, and further can reali