Abstract: The invention relates to a method for producing an antibiotic bone cement, whereby, in a step A), a bone cement base powder with a water content of less than or equal to 1.0% by weight is mixed with trometamol-fosfomycin to form a bone cement powder, and, in a step X), the bone cement powder is dried to a water content of less than or equal to 1.0% by weight. The invention also relates to a bone cement powder that was produced according to said method and contains a bone cement base powder and trometamol-fosfomycin, whereby the bone cement powder has a water content of less than or equal to 1.0% by weight. The bone cement powder is free-flowing and does not clump and can be used for producing bone cements that meet ISO 5833.