麦积山石窟第四窟是北周大都督李允信为亡父造像的功德窟,过去多位专家学者对此窟的开凿时间进行考证,存在异议,现再进行考证。重点对此窟七佛龛内顶部“薄肉塑”壁画,过去亦有专家提及,但一直没有被受到重视,其中“沥粉塑”壁画,至今不为人所知的壁画,进行详细考察辨析。初步识读出每龛四方壁画中,多种麦积山石窟中其他窟内从未有的新题材,及组合经变的内容思想,如卢舍那、释迦、阿弥陀、弥勒佛的组合,《观佛三昧海经》禅法观像等。为研究麦积山石窟佛教造像(壁画)和秦地佛教传播情况,以及研究北方石窟寺,乃至中国石窟寺之间佛教造像(壁画)的互为影响,亦是难得珍贵的实物资料。 The fourth Cave of the Maijishan Grottoes is the merit hall of the Northern Zhou Dynasty, the Metropolitan Governor Li Yuxin, who used to make resemblance to the deceased father. In the past, many experts and scholars conducted research on the excavation time of this cave, and there were disagreements. Focus on the seven niches in this cave in the top “thin plastic ” murals, in the past there are experts mentioned, but has not been taken seriously, including “Lek Mori ” murals, the hitherto unknown murals, detailed Discrimination. A preliminary reading of the new theme that has never been seen in other quadrangles of the Maiji Mountain Grottoes in the four-square murals of each niche and the combination of the changed content ideas such as the combination of Roushena, Shakya, Amitabha and Maitreya, “View Buddhism Samadou” Zen concept and so on. It is also a valuable and invaluable kind of material to study the Buddhist statues (murals) of the Maiji Mountain Grottoes and the dissemination of Buddhism in the Qin Dynasty, as well as to study Buddhist statues (murals) between the northern cave temples and even the cave temples in China.