The invention discloses a manufacturing method of a crumpling structure for a 
bus instrument 
desk pipe column. The manufacturing method comprises the following steps that 40Cr is adopted in advance for 
quenching and 
tempering, a steering shaft is manufactured and subjected to a dynamic balancing test through a 
balancing machine, and the steering shaft is prepared; 55# steel is adopted in advance for manufacturing a spherical shell, a thread part of a spline is subjected to high-frequency 
quenching heat treatment, 20CrMoTi is adopted for manufacturing a starlike sleeve and a 
retainer, GCr15 isadopted for manufacturing steel balls, and a 
universal joint is prepared; and an electroplated Ni-P 
alloy or an electroplated Ni-Fe 
alloy is adopted in advance for manufacturing a transmission shaft and a transmission shaft sleeve in an electroplated mode, surface 
quenching treatment is conducted, a nylon PA11 special material is subjected to injection molding on the surface of the transmission shaft, and the transmission shaft and the transmission shaft sleeve are connected in a spline matched sliding mode to be assembled. According to the manufacturing method of the crumpling structure for the 
bus instrument 
desk pipe column, manufacturing and assembling are conducted through a 
system, when a vehicle is collided, a large buffer area can be provided for a 
human body, and the crumbling effect of the 
pipe column is stabilized; and the steering pipe column and a vehicle passive restraining 
system are subjected to matching optimization together, and thus the optimal crumbling moment of the pipe column is guaranteed.