The invention provides self-leveling type II polymer cement waterproof mortar. The mortar comprises Portland cement, a composite hardening accelerator, aggregates, water, polymer and other additives, wherein the composite hardening accelerator comprises the following raw materials in parts by weight: 3 to 6 parts of calcium lime, 2 to 5 parts of sodium sulphate, and 5 to 10 parts of aluminate cement. The mortar solves the durability problem of poor long-term waterproof anti-penetrability performance of common self-leveling motor due to high aluminum cement component content, realizes the self-leveling construction of polymer cement waterproof mortar, and can be applied to various waterproof construction projects, such as toilets, kitchens, roofs, swimming pools and subsurface structures.