Method for controlling an internal combustion engine supercharged by means of a turbocharger provided with a turbine and a compressor; the control method comprises the steps of: determining the current reduced mass flow rate (Q AHR) of the compressor; determining a critical threshold (M critica) of the reduced mass flow rate (Q AHR) which delimits in the plane reduced mass flow rate / compression ratio a portion of the useful area of the operating range of the turbocharger - critical area -; determining a safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR), said safety threshold (M max_turbo) delimiting, in the plane reduced mass flow rate / compression ratio, an area close to the achievement of sonic conditions, wherein said safety threshold (M max_turbo) is greater than the critical threshold (M critica); determining a safety threshold (N max_turbo) of the speed of the supercharged internal combustion engine calculated using the following equation: N max _ turbo = M max _ turbo ⋅ T o _ rif T o ⋅ P o P o _ rif ⋅ 1 m ⋅ 30 ⋅ N cil wherein: N max_turbo safety threshold of the speed; M max_turbo safety threshold of the of the reduced mass flow rate (Q AHR); T o absolute temperature upstream of the compressor; P o absolute pressure upstream of the compressor; T o_rif absolute reference temperature; P o_rif absolute reference pressure; N cil number of cylinders of the internal combustion engine; and m mass of air drawn for each cylinder; and imposing the fact that the reduced mass flow rate (Q AHR) of the compressor has to be lower than the safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR); and imposing the fact that the speed of the supercharged internal combustion engine has to be lower than the safety threshold (N max_turbo) of the speed; using the safety threshold (N max_turbo) of the speed of the supercharged internal combustion engine to limit the speed of the supercharged internal combustion engine, so that the current reduced mass flow rate (Q AHR) is lower than safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR). determining the current reduced mass flow rate (Q AHR) of the compressor; determining a critical threshold (M critica) of the reduced mass flow rate (Q AHR) which delimits in the plane reduced mass flow rate / compression ratio a portion of the useful area of the operating range of the turbocharger - critical area -; determining a safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR), said safety threshold (M max_turbo) delimiting, in the plane reduced mass flow rate / compression ratio, an area close to the achievement of sonic conditions, wherein said safety threshold (M max_turbo) is greater than the critical threshold (M critica); determining a safety threshold (N max_turbo) of the speed of the supercharged internal combustion engine calculated using the following equation: N max _ turbo = M max _ turbo ⋅ T o _ rif T o ⋅ P o P o _ rif ⋅ 1 m ⋅ 30 ⋅ N cil wherein: N max_turbo safety threshold of the speed; M max_turbo safety threshold of the of the reduced mass flow rate (Q AHR); T o absolute temperature upstream of the compressor; P o absolute pressure upstream of the compressor; T o_rif absolute reference temperature; P o_rif absolute reference pressure; N cil number of cylinders of the internal combustion engine; and m mass of air drawn for each cylinder; and imposing the fact that the reduced mass flow rate (Q AHR) of the compressor has to be lower than the safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR); and imposing the fact that the speed of the supercharged internal combustion engine has to be lower than the safety threshold (N max_turbo) of the speed; using the safety threshold (N max_turbo) of the speed of the supercharged internal combustion engine to limit the speed of the supercharged internal combustion engine, so that the current reduced mass flow rate (Q AHR) is lower than safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR). N max_turbo safety threshold of the speed; M max_turbo safety threshold of the of the reduced mass flow rate (Q AHR); T o absolute temperature upstream of the compressor; P o absolute pressure upstream of the compressor; T o_rif absolute reference temperature; P o_rif absolute reference pressure; N cil number of cylinders of the internal combustion engine; and m mass of air drawn for each cylinder; and imposing the fact that the reduced mass flow rate (Q AHR) of the compressor has to be lower than the safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR); and imposing the fact that the speed of the supercharged internal combustion engine has to be lower than the safety threshold (N max_turbo) of the speed; using the safety threshold (N max_turbo) of the speed of the supercharged internal combustion engine to limit the speed of the supercharged internal combustion engine, so that the current reduced mass flow rate (Q AHR) is lower than safety threshold (M max_turbo) of the reduced mass flow rate (Q AHR).