The invention discloses a hot-dip coating steel plate with excellent anti-notch-corrosion resistance. The steel plate comprises a substrate and an Al-Zn-Si-Mg coating which coats substrate, a surfacelayer of the Al-Zn-Si-Mg coating is provided with a thickness region range, and within in the thickness region range, the weight ratio of Al to Zn is between 0.40-0.70. Accordingly, the invention further discloses a manufacturing method of the hot-dip coating steel plate. The manufacturing method comprises the steps that (1) substrate pretreatment is carried out; (2) the substrate is fed into a plating solution tank for hot-dip coating, and the temperature of the plating solution tank is 565-605 DEG C; and (3) the steel plate leaves the plating solution and is subjected to sectional cooling. According to the hot-dip coating steel plate with excellent anti-notch-corrosion resistance, the effect of resisting failure spreading capability of the processing film from a notch is remarkable, andalloy elements with relatively high cost do not need to be added to the hot-dip coating steel plate.