Low-temperature early-strength tough well cementation material

The invention discloses a low-temperature early-strength toughness well cementation material, and relates to the technical field of oil-gas field development well cementation materials. The cement paste system is composed of the following raw materials in percentage by weight: 57-77.6 wt% of a cementing material; 20 wt%-36 wt% of a reinforcing material; 1 wt% to 3 wt% of polymethyl methacrylate; 0.2 wt% to 0.5 wt% of glass fiber; 1 wt%-3 wt% of an early strength agent; 0.2 wt% to 0.5 wt% of a dispersant; the reinforcing material is a mixture formed by mixing superfine lithium slag, nano bauxite and pumice powder according to the weight ratio of 1: 2: 1; the early strength agent is a mixture formed by mixing lithium carbonate and triisopropanolamine according to the weight ratio of 3: 1. The low-temperature early-strength toughness well cementation material provided by the invention has the advantages of high strength and high toughness at low temperature, can effectively solve the problems of poor strength an