The invention relates to a die cleaning method for tubular piles, which comprises the following steps: step 1, a photoelectric switch, release agent spraying equipment and die cleaning equipment are arranged in the pipe die moving direction from the front to the back in sequence; step 2, the photoelectric switch is cut off when a pipe die is detected, after the photoelectric switch is cut off, the release agent spraying equipment is started by an electrical signal to spray a release agent on the surface of a die cavity of the die, and meanwhile, the die cleaning equipment is start to enter a working state from a standby state; step 3, the pipe die moves forwards to be sprayed with the release agent gradually and cleaned by the die cleaning equipment gradually; step 4, when the photoelectric switch is switched on again, the release agent spraying equipment stops spraying, and the die cleaning equipment stops die cleaning and is reset to enter the standby state. The invention aims to provide a die cleaning line, the die cleaning equipment and the die cleaning method for the tubular piles, which have the advantages of simplicity and convenience in operation, low labor intensity, high degree of automation and high die cleaning quality.