Electrical aid apparatus for an animal-drawn vehicle or machine, movable on wheels on a ground, comprising a first frame towed by fastening means for connection to the animal, comprising: means for measuring the tensile load, arranged so as to detect the load exerted by the animal connected to said fastening means, an electric motor to assist the traction of the vehicle, a motion transmission driven by said motor and connected to traction wheels of the vehicle, one or more sensors capable of reading the movement of at least one wheel associated with the vehicle motion with respect to the ground, an electric power supply of the motor, a central control unit operatively connected to said motor, to said measuring means and to said sensors for adjusting and managing traction aid parameters, a brake acting on one or more wheels of the vehicle or machine characterized in that said effort measuring means are configured to read in succession dynamic data comprising the value and sign of the tensile load exerted by the animal and communicate it to the central control unit, simultaneously the sensors are configured to read the movement of said at least two wheels of the vehicle and communicate it to the central control unit independently for each wheel providing first kinematic data relating to both the motion speed and direction of the wheels, and in that said control unit is configured to process said dynamic data and said first kinematic data of the wheels and determine the vehicle speed and travel direction, identify which traction and motion condition of the vehicle is occurring between a number of predetermined traction and motion conditions defined at least by the vehicle motion direction and the intensity and sign, positive traction or negative compression, of the load exerted or undergone by the animal, and command the motor to implement a corrective action of electric traction aid based on the identified traction and motion condition and possibly on one or more predefined fatigue threshold values of the tensile load. means for measuring the tensile load, arranged so as to detect the load exerted by the animal connected to said fastening means, an electric motor to assist the traction of the vehicle, a motion transmission driven by said motor and connected to traction wheels of the vehicle, one or more sensors capable of reading the movement of at least one wheel associated with the vehicle motion with respect to the ground, an electric power supply of the motor, a central control unit operatively connected to said motor, to said measuring means and to said sensors for adjusting and managing traction aid parameters, a brake acting on one or more wheels of the vehicle or machine characterized in that said effort measuring means are configured to read in succession dynamic data comprising the value and sign of the tensile load exerted by the animal and communicate it to the central control unit, simultaneously the sensors are configured to read the movement of said at least two wheels of the vehicle and communicate it to the central control unit independently for each wheel providing first kinematic data relating to both the motion speed and direction of the wheels, and in that said control unit is configured to process said dynamic data and said first kinematic data of the wheels and determine the vehicle speed and travel direction, identify which traction and motion condition of the vehicle is occurring between a number of predetermined traction and motion conditions defined at least by the vehicle motion direction and the intensity and sign, positive traction or negative compression, of the load exerted or undergone by the animal, and command the motor to implement a corrective action of electric traction aid based on the identified traction and motion condition and possibly on one or more predefined fatigue threshold values of the tensile load. process said dynamic data and said first kinematic data of the wheels and determine the vehicle speed and travel direction, identify which traction and motion condition of the vehicle is occurring between a number of predetermined traction and motion conditions defined at least by the vehicle motion direction and the intensity and sign, positive traction or negative compression, of the load exerted or undergone by the animal, and command the motor to implement a corrective action of electric traction aid based on the identified traction and motion condition and possibly on one or more predefined fatigue threshold values of the tensile load.