Gypsum-cement machine-spraying dry powder mortar and construction method thereof

The invention relates to a gypsum-cement machine-spraying dry powder mortar and a construction method thereof. The gypsum-cement machine-spraying dry powder mortar is prepared by blending gypsum-cement, cellulose ether, an early strength agent and re-dispersible rubber powder, and comprises the following component materials in percentage by weight: 20-75% of the gypsum-cement, 0.01-0.4% of the cellulose ether, 0-0.6% of the early strength agent, 0-4% of the re-dispersible rubber powder, 25-80% of fine sand and 0-0.6% of lignin fiber. The invention also relates to a construction method of the gypsum-cement machine-spraying dry powder mortar. The gypsum-cement machine-spraying dry powder mortar can be used as an inner wall machine-spraying mortar and an outer wall machine-spraying mortar; and tests show that one year later after construction, the gypsum-cement machine-spraying dry powder mortar does not generate hollowing, falling, crackles and cracking through detection, and is excellent in construction perfor