The invention provides an automatic cloth cutting machine, and relates to the field of textile equipment. After to-be-cut cloth is put into a cloth placing device, the to-be-cut cloth is unfolded through a guide roller, the tension of the cloth is adjusted and deviation correction is conducted through a tension deviation correcting device, longitudinal cutting is conducted after the to-be-cut cloth enter a longitudinal cutting deviation correction device, the rough edges of the two sides of the to-be-cut cloth are cut, the cloth obtained after the rough edges are cut enters a tension maintaining device to maintain tension, the cloth enters a transverse cutting device after passing through a cloth storage device and transverse cutting is conducted according to the required length. The automatic cloth cutting machine can perform longitudinal cutting and transverse cutting on the cloth of the turned edge, so the efficiency is high, the cut-off precision is higher, the labor cost is greatly reduced and the cutting quality is improved; an edge absorbing device and an infrared centering device perform tension adjustment and primary derivation correction on the cloth and control the clothedge cutting deviation; due to the design of the unique needle plate synchronous belt assembly, the turned edge of the cloth can be hung on the needle plate and a guarantee is provided for longitudinal cutting; and the automatic cloth cutting machine has high equipment cost performance and is suitable for popularization.