The invention relates to the field of salt collecting and auxiliary devices thereof, in particular to an extending type salt loosening mechanism. The extending type salt loosening mechanism comprisesa mobile vehicle frame, a salt loosening claw support, a middle salt loosening claw connecting frame and two side salt loosening claw connecting frames; the salt loosening claw support is connected tothe mobile vehicle frame, the salt loosening claw support is connected with the middle salt loosening claw connecting frame, the two ends of the middle salt loosening claw connecting frame are hingedto the two side salt loosening claw connecting frames, and folding support assemblies are arranged between the side salt loosening claw connecting frames and the salt loosening claw support. Throughan unfolding mechanism, the salt loosening area becomes large.