The invention discloses a time-share four-wheel commercial vehicle transfer case with a differential limiting function. The time-share four-wheel commercial vehicle transfer case comprises a transfercase body rotationally provided with a power input shaft, a rear transmission shaft and a front transmission shaft. The front transmission shaft and the power input shaft are arranged in parallel. Thepower input shaft is rotationally sleeved with a four-wheel driving gear. A rear transmission driven gear is installed on the rear transmission shaft. A synchronizer is installed at the tail end of the power input shaft and is matched with the four-wheel driving gear and the rear transmission driven gear to be used correspondingly. A front transmission gear system is installed on the front transmission shaft. A differential transmission system is further arranged in the transfer case body. The input end of the differential transmission system is connected with the four-wheel driving gear. Theoutput end of the differential transmission system is connected with the rear transmission driven gear and the front transmission gear system. The time-share four-wheel commercial vehicle transfer case can fast respond to the torque difference of front and rear axles, torque of the front and rear axles is redistributed, the effect that an engine is in a relatively reasonable torque point all thetime is ensured, a front and rear differential effect can be achieved, and two-wheel and four-wheel switching can also be conducted.