The invention relates to a crawler-type peanut mulching film rupturing seedling leading machine and a working method thereof, and belongs to the technical field of agricultural equipment. The device comprises a walking part and film rupturing seedling leading execution devices; the walking part drives the whole device to run, the film rupturing seedling leading devices make tips stretch into a mulching film through telescoping of hydraulic telescopic cylinders, swing arms connected with the tips can be meshed or opened through a connecting rod with an included angle, and then mulching film piercing and cutting are completed, and a central processing unit provides integrated control. Accordingly, the seedling position needing film mulching can be accurately determined, the multiple film rupturing seedling leading execution devices can be controlled by the central processing unit to work independently, the film rupturing efficiency is high, harm to seedlings is small, the break area andfilm rupturing degree are controllable, requirements of different terrains such as stone land and concave-convex hills can be met, and the popularization value is high.