The invention discloses a dacromet coating containing modified siloxane resin and a preparation method of same. The coating includes a component A and a component B, wherein the component A is formedfrom 40-47% of modified siloxane resin, 5-6% of aluminum powder, 2-3% of zinc powder, 3-5% of a stabilizing agent, 36-42% of polyethylene glycol, 0.5-2% of an anti-flash-rust agent, and 3-5% of an corrosion inhibitor; the structure of the modified siloxane resin is represented as the specification, wherein R and R1 are respectively alkyl groups; the component B is a mixture of a crosslinking agentand a solvent, wherein the mixture includes, by mass, 30-40% of a titanium compound and 60-70% of a solvent. The dacromet coating has extensive raw material sources and simple preparation method. Themodified siloxane has high crosslinking density, so that the coating is significantly improved in anti-corrosion effect and can reach 800 h in salt fog resistant time.