A co and counter stage hydrotreating process for deep desulfurization and deep hydro-treating of diesel range hydrocarbons, comprising: (a) segregating a full range diesel feed stream into a first feed stream and a second feed stream by a distillation technique, wherein the first feed stream has boiling point in the range of 200 to 320°C and the second feed stream has boiling point in the range of 320 to 390°C; (b) mixing and preheating the second feed stream with water and amine washed recycle hydrogen and passing through a first hydrotreating zone of a first stage hydrotreating to obtain an effluent; (c) mixing the effluent obtained in step (b) with the first feed stream and the recycle hydrogen and passed to a second hydrotreating zone of the first stage hydrotreating to obtain an another effluent; (d) separating the effluent obtained in step (c) in a liquid part and a gaseous part; wherein the gaseous part comprises of bulk of hydrogen with hydrogen sulfide and ammonia; (e) cooling and washing the gaseous part obtained in step (d) with water and amine to obtain recycle hydrogen; wherein the recycle hydrogen comprises of bulk of hydrogen with reduced hydrogen sulphide and ammonia; (f) recycling the recycle hydrogen obtained in step (e) to the first and the second hydrotreating zone of the first stage hydrotreating; (g) flashing the liquid part obtained in step (d) to obtain a top flashed liquid and a bottom flashed liquid; (h) recovering the top flashed liquid obtained in step (g) as diesel product; (i) dividing the bottom flashed liquid obtained in step (g) in a first part and a second part; wherein the first part is recovered as diesel product; (j) mixing the second part obtained in step (i) with make-up hydrogen and passed to a second stage hydrotreating to obtain another effluent; (k) mixing the effluent obtained in step (j) with the second feed stream obtained in step (a). (a) segregating a full range diesel feed stream into a first feed stream and a second feed stream by a distillation technique, wherein the first feed stream has boiling point in the range of 200 to 320°C and the second feed stream has boiling point in the range of 320 to 390°C; (b) mixing and preheating the second feed stream with water and amine washed recycle hydrogen and passing through a first hydrotreating zone of a first stage hydrotreating to obtain an effluent; (c) mixing the effluent obtained in step (b) with the first feed stream and the recycle hydrogen and passed to a second hydrotreating zone of the first stage hydrotreating to obtain an another effluent; (d) separating the effluent obtained in step (c) in a liquid part and a gaseous part; wherein the gaseous part comprises of bulk of hydrogen with hydrogen sulfide and ammonia; (e) cooling and washing the gaseous part obtained in step (d) with water and amine to obtain recycle hydrogen; wherein the recycle hydrogen comprises of bulk of hydrogen with reduced hydrogen sulphide and ammonia; (f) recycling the recycle hydrogen obtained in step (e) to the first and the second hydrotreating zone of the first stage hydrotreating; (g) flashing the liquid part obtained in step (d) to obtain a top flashed liquid and a bottom flashed liquid; (h) recovering the top flashed liquid obtained in step (g) as diesel product; (i) dividing the bottom flashed liquid obtained in step (g) in a first part and a second part; wherein the first part is recovered as diesel product; (j) mixing the second part obtained in step (i) with make-up hydrogen and passed to a second stage hydrotreating to obtain another effluent; (k) mixing the effluent obtained in step (j) with the second feed stream obtained in step (a).