The invention relates to an inserted buckle type code car lock, wherein lock sleeves for insertion and traverse of inserted bars at two sides of a U-shaped lock beam are arranged at front and back ends of a lock body; one bolt or left and right bolts moved along a sliding chute of the lock body, a bolt return spring and a plurality of digital poke rings are arranged on the lock body; the digital poke rings are sequentially sleeved on the lock body and can be rotated along the lock body; a plurality of square slots are arranged on the inner ring of each digital poke ring; a plurality of squarebumps corresponding to and movably cooperated with the square slots of the digital poke rings are arranged on the bolt; spring ball assemblies corresponding to positions of the digital poke rings arearranged on the lock body; arc-shaped slots cooperated with balls are arranged on the inner rings of the digital poke rings; a number checking mark is arranged at the surface of one lock sleeve of the lock body; for the lock body with only one bolt, a toothed inserted bar is arranged at one side of the lock beam and a smooth inserted bar is arranged at the other side of the lock beam; and for thelock body with the left and right bolts, the toothed inserted bars are arranged at two sides of the lock beam and one or more than one lock slots in slant sliding fit with the bolts are arranged on the toothed inserted bars. The code car lock provided by the invention has the advantages of no need for a key, convenience and reliability in use and simple structure.